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    Application of Synchrotron Radiation Based Electrochemical In-Situ Techniques to Study of Electrode Materials for Lithium-Ion Batteries
    GONG Zheng-liang, ZHANG Wei, LV Dong-ping,HAO Xiao-gang, WEN Wen, JIANG Zheng, YANG Yong
    Journal of Electrochemistry    2013, 19 (6): 512-522.   DOI: 10.13208/j.electrochem.130361
    Abstract5596)      PDF(pc) (5324KB)(19979)       Save
    Due to its merits of high brightness and high intensity, high level of polarization and wide tunability in energy, etc., synchrotron radiation technique provides an unique platform for analysis of the relationship among composition–structure–performance of materials for lithium ion batteries, especially for in-situ, real time dynamic investigation of the electrochemical reaction mechanism, aging process and failure mechanism during charge-discharge cycling. In this paper, we review the latest developments in application of synchrotron based electrochemical in-situ experimental methods to studies of lithium ion batteries. The paper mainly focuses on the application of electrochemical in-siu XRD and XAFS techniques to the investigations of material structure evolution, charge compensation mechanism and reaction kinetics of batteries during charge-discharge cycling.
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    Cited: Baidu(20)
    Performance of VN as Negative Electrode Materials in Electrochemical Capacitors
    GAO Zhao-hui,ZHANG Hao*,CAO Gao-ping,HAN Min-fang,YANG Yu-sheng
    Journal of Electrochemistry    2013, 19 (2): 178-183.  
    Abstract2778)      PDF(pc) (14141KB)(10033)       Save
    Nanocrystalline vanadium nitride (VN) materials were synthesized by high temperature ammonia (NH 3) reduction of vanadium oxide (V 2O 5). The structure and morphology of VN materials were characterized by XRD,SEM and TEM, while the specific surface area, pore size distribution and supercapacitive behavior by N2 absorption, cyclic voltammetry (CV) and constant current charge-discharge measurements in 1 mol?L-1 KOH electrolyte. The results showed that the VN sample belonged to the cubic crystal system (Fm3m [225]),and had homogeneous surface and appeared nearly spherical with uniform size. As the reaction time was extended to 12 h,small particles were interconnected with each other to form some mesopores. The specific capacitance of VN-c was 192 F.g -1 at current density of 50 mA.g -1,and retained 150 F.g -1 after 1000 cycles. The VN sample possessed both capacitive properties of electrical double-layer and pseudocapacitive properties of redox reactions.
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    Electric Vehicles and Power Batteries
    AI Xin-Ping, YANG Han-Xi
    Journal of Electrochemistry    2011, 17 (2): 123-133.  
    Abstract5148)      PDF(pc) (2024KB)(7350)       Save
    In retrospect of the historical development of Electric Vehicles (EV), the impact of battery technologies on the progress of EV was discussed. In consequence, it is concluded that the lack of advanced batteries was the main cause for the fluctuations of EV development and the sluggish commercialization of electric cars in the past century. After a brief introduction to the classification and the requirements of electric vehicles, the main issues of the batteries including safety, temperature range for operation and the cost as well as the effects of these factors on the applications of advanced batteries for electric vehicles were discussed. Finally, the hot areas for future development in EV battery technologies were discussed.
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    Voltammetric Behavior and Electrocatalytic Properties of Hemoglobin at Glassy Carbon Electrode Modified with Lauric Acid
    MIAO Xin-rui1,ZHANG Xu-hong2,XIE Ying2
    Journal of Electrochemistry    2007, 13 (2): 203-206.  
    Abstract8419)      PDF(pc) (283KB)(7251)       Save
    The electrochemical behavior of hemoglobin at glassy carbon(GC)electrode modified with Lauric Acid was studied.In the potential of +0.6~-0.7 V(vs.Ag/AgCl),an irreversible cathodic peak was observed at-0.3 V at the scan rate of 20 mV·s-1.In the medium of 0.02 mol·L-1 KH2PO4-Na2HPO4(pH 7.0),ip increased with the increasing concentration of Hb and the value of pH.The peak currents were proportional to the concentrations of hemoglobin in the range of 1.00×10-8~5.00×10-9 mol·L-1 and 1.92×10-6~2.06×10-7 mol·L-1.The data was analyzed in details by simulating in order to obtain more information and reaction mechanism of Hb on modified electrode.The electrode can be used as an approach for determining hemoglobin with high sensitivity.
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    Applications of Raman Spectroscopy Technique in Lithium Ion Batteries
    ZHAO Liang, HU Yong-Sheng, LI Hong, WANG Zhao-Xiang, XU Hong-Xing, HUANG Xue-Jie, CHEN Li-Quan
    Journal of Electrochemistry    2011, 17 (1): 12-23.  
    Abstract6138)      PDF(pc) (5621KB)(7134)       Save
    The Raman spectroscopy has been widely used in the study of lithium ion batteries.In this short review,we gave some examples of the applications of Raman spectroscopy in the study of electrode materials including carbonaceous materials,spinel LiMxMn2-x O4,LiFePO4,as well as polymer electrolytes,room temperaturemolten salt electrolytes and the solid-electrolyte interphase layers.The advantages and disadvantages of the ex-situ and in-situ Raman spectrum techniques are discussed.Using new Raman techniques to investigate Li-ion batteries are suggested.
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    The Research of Organic Electrolyte Solutions for Li-Ion Batteries
    ZHUANG Quang chao,WU Shan,LIU Wen yuan,Lu Zhao da
    Journal of Electrochemistry    2001, 7 (4): 403-412.  
    Abstract3338)      PDF(pc) (416KB)(6743)       Save
    The characteristics of organic electrolyte solutions and its influences on the ion conductivity are summarized. The chemistry and electrochemistry of organic electrolyte solutions and characteristics of ordinary organic solvents are introduced. Progresses in studies of organic electrolyte solutions such as electrolyte salts, organic solvents, additives in recent years are reviewed, current situation of the studies of organic electrolyte solutions were also discussed.
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    Low-Temperature Performance of Li-Ion Battery with Fluoroethylene Carbonate Electrolyte
    YANG Chun-wei1,WU Feng1,2,WU Bo-rong1,REN Yong-huan1,YAO Jing-wen2
    Journal of Electrochemistry    2011, 17 (1): 63-66.  
    Abstract5311)      PDF(pc) (1884KB)(4936)       Save
    The low temperature performance of electrolytes containing FEC including FEC+EMC,EC and PC,as well as the compatibility of electrolytes with LiFePO4 anode and with MCMB cathode were investigated.The electrolyte exhibits a high value of ionic conductivity at low temperature.The stability of cathode was enhanced by the formation of SEI film at 1.6 V as a result of FEC reaction.The infrared spectra showed that FEC can suppress decomposition of other solvents during SEI formation,and lower the resistance of SEI on MCMB cathode.The electrochemistry test indicates that Li-ion batteries with FEC electrolyte display high capacity at low temperature and better rate performance.
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    Fundamentals of Distribution of Relaxation Times for Electrochemical Impedance Spectroscopy
    WANG Jia, HUANG Qiu-an, LI Wei-heng, WANG Juan, ZHUANG Quan-chao, ZHANG Jiu-jun
    Journal of Electrochemistry    2020, 26 (5): 607-627.   DOI: 10.13208/j.electrochem.200641
    Abstract4768)   HTML255)    PDF(pc) (55357KB)(4781)       Save

    Electrochemical impedance spectroscopy (EIS) is a powerful electrochemical characterization technology, which has been widely used in the field of electrochemical energy, such as lithium-ion batteries, supercapacitors, fuel cells, etc. Distribution of relaxation time (DRT) is an EIS deconvolution technique which does not depend on the prior knowledge of the targeted research object. Furthermore, DRT can serve to separate and analyze physical and chemical processes which are highly overlapped in their EIS data. In order to encourage the application and popularization of DRT deconvolution technology, several core questions are addressed in this paper: (1) DRT deconvolution principle, implementation steps and important extensions; (2) DRT deconvolution method for typical circuit elements; (3) DRT implementation software and typical electrochemical energy application examples; (4) achievements, challenges and development trends for DRT deconvolution technique.

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    Journal of Electrochemistry    2001, 7 (2): 255-255.  
    Abstract2149)      PDF(pc) (87KB)(4717)       Save
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    Electrochemical Deposition of Zinc Oxide Crystal Whiskers
    LU Peng-zeng,LI Su,JIA Jin-qian,LIANG Zhen-hai
    Journal of Electrochemistry    2011, 17 (1): 93-96.  
    Abstract3812)      PDF(pc) (1386KB)(4634)       Save
    Pine needle ZnO crystal whiskers were electrodeposited by anodization of zinc foil.The crystal whiskers were characterized by scanning electron microscopy(SEM) and X-ray diffraction(XRD) spectroscopy.The results show that the lengths and diameters of ZnO crystal whiskers are 200~300 nm and 20~50 nm,respectively,with the ratio of the length to diameter ranging from 10~15.The whiskers belong to wurtzite ZnO(JCPDS 36-1451) with good crystallinity and high purity.The crystalization behavior of ZnO was studied by cyclic voltammetry.The effects of the surface oxide layer at the zinc substrates and the [Zn(OH)4]2-concentration of the aqueous electrolyte on the formation of zinc oxide whiskers were investigated.
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    Research Progress in Orthosilicates as Cathode Materials for Li-ion Batteries
    LV Dong-ping, WANG Lin, YANG Yong
    Journal of Electrochemistry    2011, 17 (2): 161-168.  
    Abstract5903)      PDF(pc) (2074KB)(4606)       Save
    Rechargeable Li-ion batteries fulfilling high-energy density, high safety, environmental friendliness, and low cost are demanded urgently for energy storage systems. Besides the structure stability arising from the strong Si-O covalent bond, environmental benignancy and low cost from the characteristics of Fe, Mn, Si elementals, orthosilicates (Li2MSiO4) show promising prospect to meet the demand of high-energy density for its two available Li+ per formula unit. Motivated by these significant advantages, Li2MSiO4 have been intensively investigated in the past few years. In the present work, we gave a review on the progress of orthosilicate research including the materials synthesis, structure, electrochemical performances and mechanism study. In addition, some aspects of further research as well as the problems need to be paid attention to were proposed.
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    Study on the Fluorescent Carbon Nanodots with Electrochemical Methods
    QI Bao-Ping, LONG Yan-Min, BAO Lei, LIU Cui, ZHANG Zhi-Ling, PANG Dai-Wen
    Journal of Electrochemistry    2011, 17 (3): 271-277.  
    Abstract6890)      PDF(pc) (1639KB)(4552)       Save
    Carbon nanodots are a new class of fluorescent nanoparticles with a carbon-based core, which possess wavelength-tunable luminescence, high photostability, resistance to photobleaching, water-solubility, and ease of bioconjugation. Owing to their attractive merits, carbon nanodots like other carbon nanomaterials such as fullerene, carbon nanotubes and graphene, have attracted much attention. In addition, carbon nanodots can be inexpensively produced by electrochemical methods with simple post-processing under mild conditions. Electrochemical approaches have unique advantages in the analysis of surface structures and luminescence mechanism of materials. In this review, recent advances in electrochemical methods used for the synthesis and luminescence mechanism of fluorescent carbon nanodots were summarized. The possible applications of carbon nanodots in biosensing are also included.
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    Research Progress on Proton Exchange Membranes of Fuel Cells
    YU Jing_rong, XING Dan_min, LIU Fu_qiang, LIU Jian_guo, YI Bao_lian
    Journal of Electrochemistry    2001, 7 (4): 385-395.  
    Abstract2811)      PDF(pc) (171KB)(4545)       Save
    The proton exchange membrane fuel cells(PEMFC) use proton exchange membranes(PEM) as their electrolytes. The performance of the PEMFC is strongly dependent on the characteristics of the PEM. In this paper, the requirements of the PEM utilized in the PEMFC were analyzed. The per_fluorinated, partially fluorinated and non_fluorinated PEM were introduced respectively. The structures, preparation, properties of the various types of PEM and their applications in the PEMFC were also discussed in detail.
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    Failure Reaction Mechanism of Internal Short-Circuit for Lithium-ion Batteries
    LI He1 ,YU Shen-jun1,CHEN Zhi-kui1,LIANG Guang-chuan2
    Journal of Electrochemistry    2010, 16 (2): 185-191.  
    Abstract4678)      PDF(pc) (455KB)(4467)       Save
    In this work,the battery impact testing machine has been used to study the failure progress of internal short-circuit ( ISC) for lithium ion batteries. The reaction mechanisms between cathode/anode and electrolyte in the battery at different temperatures were characterized by differential scanning calorimetry ( DSC) ,gas chromatography/mass spectrometry ( GC/MS) and X-ray diffraction ( XRD) . The experimental results show that the ISC failure of the battery was mainly due to the reaction between cathode Li0.5CoO2 and electrolyte. The decomposition and oxygen evolution reactions of cathode occurred when the temperature reached a certain value. At the same time a fierce oxidation reaction occurred between oxygen and electrolyte,giving out a large quantity of CO2 gas,and breaking aluminum can,thus causing the battery exploded. And the decomposition of SEI film and the initial reaction between anode and electrolyte were mainly to accumulating heat for the reaction between cathode and electrolyte.
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    Progress and Perspective of Fuel Cell Technology
    HOU Ming, YI Bao-Lian
    Journal of Electrochemistry    2012, 18 (1): 1-13.  
    Abstract4804)      PDF(pc) (2923KB)(4396)       Save
    Fuel cell, a clean and high-efficiency electrochemical power source, has being paid much attention worldwide recent years. In this paper, the progress and perspective of fuel cell technology are elucidated in detail. Fuel cells have been applied in some special fields such as spacecraft, shuttle and submarines. However, in the areas of transportation, stationary station and portable power source, fuel cells are still under demonstration due to the durability and cost problems. The reliability and surrounding survivability of fuel cells should be enhanced in the special application. Meanwhile, the durability and cost of fuel cells are the main issues to be solved in the civil application. Fuel cell technologies need to be improved from three aspect innovations of key materials, components and system in order to realize fuel cell commercialization.
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    Cited: Baidu(34)
    Hydrothermal Synthesis of Pure Li 4Ti 5O 12 and Its Electrochemical Performance
    XIE Wen-jun, HE Yu-shi, WANG Hong, LIAO Xiao-zhen, MA Zi-feng*
    Journal of Electrochemistry    2013, 19 (2): 135-140.  
    Abstract3263)      PDF(pc) (10576KB)(4107)       Save
    Spinel Li 4Ti 5O 12 was prepared by hydrothermal method using commercial anatase (TiO 2) and lithium hydroxide (LiOH) as raw materials. The effects of the LiOH concentration of lithium hydroxide, hydrothermal reaction time and calcination temperature on the structure and electrochemical performance of Li4Ti5O12 were investigated. The formation process of Li 4Ti 5O 12 was also proposed. The micro-structure and morphology wereas characterized by XRD, SEM, TEM techniques, and the electrochemical performance was analyzed by galvanostatic charge-discharge test. The results show that the pure phase spinel Li 4Ti 5O 12 can be obtained when the LiOH concentration of lithium hydroxide is 0.2 mol.L -1, the hydrothermal time is 12 h, and the calcination temperature is 700 oC. The Li 4Ti 5O 12 annealed at 700 oC has excellent electrochemical performance., theThe discharge specific capacity reached 146.3 mAh.g -1 at the current density of 1C, and exhibited superior high-rate performance of 101.3 mAh.g -1 at 40C.
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    Comparison of Catalytic Performance on Different Materials Supported Pd Catalysts for Formic Acid Oxidation
    YANG Su-Dong, LIANG Yan-Yu, WEN Zhu-Liang, SONG Qi-Jun, ZHANG Xiao-Gang
    Journal of Electrochemistry    2011, 17 (2): 175-179.  
    Abstract5894)      PDF(pc) (1333KB)(3940)       Save
    Graphite oxide (GO) was prepared from by Hummers method. Then the graphene nanosheets supporting Pd catalysts were prepared by a single-step chemical reduction method. The electrocatalytic performance for formic acid oxidation of the prepared Pd/graphene composite was studied as an electrode material in comparison with the composite catalysts based on the other carbons (MWCNTs, SWCNTs, and Vulcan XC-72 carbon black). X-ray diffraction (XRD) and transmission electron microscopy (TEM) measurements indicated that the Pd nanoparticles were well dispersed on the surface of the graphene nanosheets with a small particle size. The electrocatalytic oxidation of formic acid was studied by electrochemically active surface area (ECSA), cyclic voltammetry (CV), chronoamperometry (CA), and chronopotentiometry (CP) measurements. It was found that the Pd/graphene composites had better catalytic activity than the other catalysts toward formic acid oxidation.
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    Studies on the Electrochemical Preparation and Electrochemical Properties of Conducting Polymers——Brief Introduction to the Research Work of Electrochemistry of Conducting Polymers in CAS Key Laboratory of Organic Solids(I)
    LI Yong-fange Academy of Sciences, Beijing 100080, China)
    Journal of Electrochemistry    2004, 10 (4): 369-378.  
    Abstract3421)      PDF(pc) (379KB)(3875)       Save
    Conducting polymers have drawn much attention since the discovery of conducting polyacetylene in 1977, due to the novelty and curiosity of their structure and properties as well as their promising applications in many aspects. Among the studies of conducting polymers, the electrochemical preparation and electrochemical properties of conducting polymers are of special importance, because the electropolymerization is a main method for preparing conducting polymer films and the electrochemical properties are the basis for their applications in the fields of electrode materials for batteries, electrocatalysis, electrochromic display, etc. We are one of the earliest research groups in the world to perform the studies of electrochemistry of conducting polymers. Starting from 1980s, we mainly studied the electrochemical polymerization processes of pyrrole and the electrochemical properties of conducting polypyrrole. The main achievements we obtained are as follows:In the studies on the electropolymerization processes of pyrrole: 1) An anion-participated electropolymerization mechanism of pyrrole was proposed and a kinetic equation of the electropolymerization was firstly deduced based on the mechanism; 2) Smooth, flexible and strong conducting polypyrrole (PPy) films (tensile strength reaches 127 MPa) were prepared electrochemically in aqueous solution by adding non-ionic surfactant OP_(10); 3) Effects of the electropolymerization conditions (anions, solvents, pH values of the eletropolymerization solutions, and the polymerization current, potential and temperature etc.) on the conductivity and mechanical strength of the as-prepared PPy films were investigated and optimized systematically. It was found that surfactant anions with concentration higher than 0.1 mol/L, low DN (donor number) solvent, acidic aqueous solution, lower temperature, appropriate current (~ 1 mA/cm) are the optimized conditions for the electropolymerization of highly conductive and flexible and strong PPy films. 4) A proton-acid doping structure was proposed and confirmed in the PPy prepared electrochemically, in addition to the doping structure with its oxidized conjugated chain. In the studies on the electrochemical properties of PPy: 1) Two redox processes of PPy corresponding to its two doping structures were observed, and the mechanisms of the electrochemical redox processes in aqueous and organic solutions were studied and elucidated by means of cyclic voltammetry, spectroelectrochemical measurement, electrochemical quartz crystal microbalance (EQCM) etc; 2) The over-potential phenomenon in the first cycle of the cyclic voltammograms of PPy prepared and measured in organic solutions was investigated and elucidated. 3) The electrochemical overoxidation degradation of PPy in aqueous solutions was studied. It was found that the overoxidation potential depends on the pH values of the aqueous solutions, the higher the pH value is, the lower the overoxidation potential will be. The mechanism of the overoxidation was proposed to be related to the oxygen produced by the electrolysis of the aqueous solutions.In addition, the stabilities of conducting polymers in aqueous solutions and in air were elucidated from the electrochemical point of view, and the electrochemical properties of polyaniline (PAn) were also studied and the mechanisms of the redox processes of PAn were elucidated by spectroelectrochemical measurement.
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    Electrocarboxylation: an Effective Process for Fixation of CO 2 into Organic Carboxylic Acids
    WANG Huan, LU Jia-xing
    Journal of Electrochemistry    2017, 23 (3): 250-261.   DOI: 10.13208/j.electrochem.161041
    Abstract1334)      PDF(pc) (7297KB)(3639)       Save

    Conversion and utilization of greenhouse gas carbon dioxide (CO2) have become more and more significant to the sustainable development of the global economy. Among them, electrocarboxylation of organic substrates is an effective process. Under mild conditions such as ambient temperature and pressure, carbocations generated by electroreduction of organic substrates can react with CO2 into corresponding carboxylic acids. This paper introduces the recent progress of our group in electrochemical carboxylation, including electrocarboxylation of varies active organic substrates and asymmetric electrocarboxylation.

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    Enhanced Visible Light Photoelectrochemical Performances with Nitrogen Doped TiO_2 Nanowire Arrays
    LV Xiao-jun1,LI Yue-ming1,ZHANG Hao1,CHEN Da1,Jennifer Hensel2,Jin Z Zhang2*,LI Jing-hong1*
    Journal of Electrochemistry    2009, 15 (4): 432-440.  
    Abstract3126)      PDF(pc) (919KB)(3547)       Save
    Self-organized anodic anatase TiO2nanowire arrays doped with nitrogen have been successfully fabri-cated and their photoelectrochemical(PEC) properties have been characterized and found to be substantially im-proved compared to undoped nanowires or commercial P25 nanoparticles.Photocurrent measured with monochro-matic incident light showed that the incident photon-to-current efficiency(IPCE,%) values of nanowire arrayelectrodes with or without N-doping were obviously higher than that of commercial P25 nanoparticle electrodes,and nitrogen-doped TiO2nanowire arrays(NTNA) had noticeable absorption in the visible region.The NTNAelectrodes showed the highest photocurrent density and power conversion efficiency under 100 mW/cm2visiblelight illumination.A maximumolphotoconversion efficiency of 0.52% was achieved for the NTNA sample at anapplied potential of 0.09 V versus Ag/AgCl(saturated KCl) electrode under visible illumination,much higherthan that of the undoped nanowire and commercial P25 nanoparticle electrodes.These results demonstrate thatNTNA thin films are promising for enhancing the photoresponse and effectively improving PEC performances ofnanostructured TiO2in the visible region for different applications including solar hydrogen generation.
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    The New Developments of Molten Salt Electrochemistry
    YANG Qi qin 1* ,DUAN Shu zhen 2
    Journal of Electrochemistry    2001, 7 (1): 10-17.  
    Abstract2808)      PDF(pc) (133KB)(3507)       Save
    New developments in the areas of molten salt systems, molten salt batteries and power, electrodeposition of metals and alloys, electro synthesis of compound materials in molten salts are presented. Application of molten electrochemistry to the energy supply and consumption,global environment, resources and recycling are predicted.
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    Some Consideration for Lithium-ion Cells' Safety
    HU Guang_xia *, XIE Jing_ying
    Journal of Electrochemistry    2002, 8 (3): 245-251.  
    Abstract2500)      PDF(pc) (326KB)(3461)       Save
    The safety is the most important problem for lithium ion cells, especially for large lithium ion cells. In this paper, some information about lithium ion cells' safety can be learned by discussing several aspects of lithium ion cells, such as, materials of lithium ion cell , manufacturing processes, using conditions and so on.
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    Research Progresses of α-C—H Bond Functionalizations under Electrochemical Conditions
    QIAN Peng, BI Mei-xiang, WANG Yu-kang, ZHA Zheng-gen, WANG Zhi-yong
    Journal of Electrochemistry    2017, 23 (3): 262-275.   DOI: 10.13208/j.electrochem.161052
    Abstract1058)      PDF(pc) (1749KB)(3414)       Save
    Recently, organic electrochemical synthesis has emerged as the most important and attractive method to construct carbon-carbon bond and carbon-heteroatom bonds in organic synthetic chemistry. This review mainly summarizes the electrochemical syntheses at present, especially focused on the recent progresses in our research group using an iodine radical as a mediator to promote α-C?H bond functionalization. The organic electrosynthesis provides an alternative approach and a new research direction in the development of green organic synthesis.
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    A Titanium-Supported Nanoporous Pd Electrocatalyst for Methanol Oxidation
    NIU Feng-juan,YI Qing-feng
    Journal of Electrochemistry    2011, 17 (1): 67-72.  
    Abstract3863)      PDF(pc) (3200KB)(3390)       Save
    Titanium-supported nanoporous palladium electrode(nanoPd /Ti) was prepared by a hydrothermal process in the presence of the ligand EDTA and using formaldehyde as reducing agent.SEM images showed that the size of Pd particles was about 60 nm and the Pd particles were connected with each other to form a three-dimensional network structure.Cyclic voltammetry(CV) and electrochemical impedance spectroscopy(EIS) were applied to evaluate the electrocatalytic activity of the nanoPd/Ti electrode towards methanol oxidation in alkaline solution.CV results showed that the nanoPd /Ti electrode presented high anodic peak densities and a low onset potential for methanol oxidation.Also nanoPd /Ti electrode showed excellent CO tolerance during the oxidation of methanol.Nyquist and Bode plots of electrochemical impedance showed that methanol electro-oxidation on the nanoPd /Ti exhibited low impedance values,and that with the increase of methanol concentrations,the impedance value for methanol electrooxidation decreaseed,indicating the significantly high electroactivity of the prepared nanoporous Pd electrode for methanol oxidation.
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    Recent Progress in Bifunctional Catalysts for Zinc-Air Batteries
    XU Neng-neng, QIAO Jin-li
    Journal of Electrochemistry    2020, 26 (4): 531-562.   DOI: 10.13208/j.electrochem.200524
    Abstract1724)   HTML16799)    PDF(pc) (5753KB)(3387)       Save

    Zinc-air battery has attracted great attention from researchers due to its high energy density and power density, which is expected to be widely used in energy conversion and storage. Air electrode as the core area of oxygen catalytic reaction is the focus of the entire zinc-air battery research. Recently, many research achievements have been made in non-noble metal bifunctional catalysts/electrodes with high activity, low cost and abundant species. In this review, we mainly focus on the reaction mechanism and the recent progress in non-noble metal oxide catalyst, carbon-based catalyst, and carbon-based transition metal compound composite and self-supporting electrode. In addition, the construction strategy of designing high-efficient bifunctional catalyst is put forward, and the prospects of the future development trends are expected.

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    Special issue: 15th National Symposium on organic electrochemistry and electrochemical industry
    Xinsheng Zhang, Chengchu Zeng
    Journal of Electrochemistry    2017, 23 (3): 247-249.   DOI: 10.13208/j.electrochem.161040
    Abstract1123)      PDF(pc) (188KB)(3355)       Save

    Organic ElectroChemistry(OEC) is an interdiscipline of Organic Chemistry and Electrochemical Technology. Compared with conventional chemical synthesis, organic electrosynthesis eliminates the utilization of toxic and / or dangerous redox reagents and proceeds under mild conditions with higher reaction selectivity, thereby has been widely used in synthesis of fine chemicals of drug, flavor, dyes and synthetic fibers. With the increasing concern of environmental problems, increasing attention has been paid to organic electrosynthesis. In the electrochemical oxidation and reduction processes, electron is used as a reagent to remove from and add to the substrates. Without utilization of stoichiometric chemical reagents and without generating the associated waste products, organic electrochemistry in nature is regarded as the “green and sustainable” chemistry.

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    Brief Introduction to Metal Corrosion and Protection
    MA Hou-Yi, CUI Cong-Ying, CHEN Ting
    Journal of Electrochemistry    2011, 17 (3): 288-291.  
    Abstract3722)      PDF(pc) (696KB)(3329)       Save
    This paper explains why corrosion processes are usually electrochemical in nature, describes the significance of electrochemical kinetic parameters of corrosion process, and briefly introduces the principles of corrosion protection, the most common corrosion protection methods and some special application of corrosion processes.
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    Innovation in Molten Salt Electrochemistry
    WANG Di-hua, CHEN Zheng~*
    Journal of Electrochemistry    2005, 11 (2): 119-124.  
    Abstract2650)      PDF(pc) (966KB)(3268)       Save
    Recent research development in molten salt electrochemistry at the Electrochemical Research Centre of Wuhan University is briefly reviewed. Attention is first paid on the preparation of silicon and its binary alloys, as well as oxide based functional materials. In addition, the quartz sealed Ag/AgCl reference electrodes suitable for high temperature molten salts are described. Focus is also given to two types of metal based cavity electrodes that are capable of loading micrograms of oxide powders and hence allow fast and reproducible measurements for the electrochemical behaviour of the powders in molten salts. The article finishes by highlighting the concept of “three-phase interline electrochemistry” in conjunction with reporting the preliminary results from the investigation of a simple "thin layer model" for the electrochemical reduction of solid AgCl in aqueous solution and solid SiO_(2)in molten salts.
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    Investigation of Supercapacitors Based on Polyvinyl Alcohol Hydrogel-Polymer Electrolyte
    XU Kai-qing, FAN Leq-ing, WU Ji-huai, LENG Qing, ZHONG Xin, LIN Jian-ming, HUANG Miao-liang, LAN Zhang
    Journal of Electrochemistry    2011, 17 (2): 190-194.  
    Abstract5106)      PDF(pc) (1266KB)(3258)       Save
    For the first time, the supercapacitor based on the hydrogel-polymer electrolyte which consisted of the cross-linking of polyvinyl alcohol-glutaraldehyde (PVA-GA) using 2-acrylamido-2-methyl propane sulfonic acid (AMPS) as solicitation reagent was assembled. The gel polymer electrolyte was characterized by FTIR and AC impedance. The maximum ionic conductivity is 1.23 mS/cm at room temperature. The electrochemical properties of the supercapacitor were investigated by cyclic voltammetry, AC impedance spectra and constant current charge-discharge curve. The results show that the specific capacitance reachs 139 F/g with AMPS of 1.0 g and 0.05 mL of 5 %(by mass) GA. And the specific capacitance still retained above 80% after 50 times of charge-discharge.
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    The Studies on Nanosized Materials for Lithium Ion Batteries
    LI Hong, LI Jing_ze, SHI Li_hong, ZHU Guang_yan, CHEN Qing, LU Wei, HUANG Xue_jie, CHEN Li_quan *
    Journal of Electrochemistry    2000, 6 (2): 131-145.  
    Abstract2606)      PDF(pc) (365KB)(3246)       Save
    Our recent works about nanosized materials for lithium ion batteries are reported, including the synthesis of nanosized Sb, SnSb, CuSn x, Si and CuS, their electrochemical performance as anode or cathode active materials,the variation of crystal structure and morphology during discharge and charge cycling. In addition,the self_plasticization of lithium salt with nanosized anion ion in polymer electrolyte,the influence of the electrochemical Li_doping on the Raman spectra and photoluminescence of nano_Si are also introduced. Furthermore,the relationship between intrinsic properties of nanosized materials and their electrochemical behaviors are discussed. The prospect of nanosized materials for lithium ion batteries is drawn.
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