LiV_3O_8电极在硫酸锂-水-乙醇电解质中的电化学性能研究(英文)

电化学（中英文） ›› 2006, Vol. 12 ›› Issue (3): 250-256.

LiV_3O_8电极在硫酸锂-水-乙醇电解质中的电化学性能研究(英文)

袁安保;宋维相;

上海大学理学院化学系,上海大学理学院化学系上海200444,上海200444

收稿日期:2006-08-28 修回日期:2006-08-28 出版日期:2006-08-28 发布日期:2006-08-28

Investigations on Electrochemical Characteristics of LiV_(3)O_(8) Electrode in Lithium Sulfate-water-ethanol Electrolytes

YUAN An-bao~

(*),SONG Wei-xiang(Department of Chemistry,College of Sciences,Shanghai University,Shanghai 200444,China

Received:2006-08-28 Revised:2006-08-28 Published:2006-08-28 Online:2006-08-28

摘要/Abstract

摘要： 应用低温液相反应再经450℃中温锻烧制备LiV3O8活性物质,并用X射线衍射(XRD)分析和扫描电镜(SEM)表征了产物LiV3O8结构、形貌.电化学方法研究LiV3O8电极在硫酸锂-水-乙醇中性电解质溶液中的性能.恒流充放电结果表明,LiV3O8电极的比容量随电解质溶液中乙醇含量的增加而降低,若同时考虑电解质溶液的电导率和电极的稳定性,水/乙醇体积比4∶1最为合适.交流阻抗测试表明,溶液的欧姆电阻以及电极/电解质界面的电荷转移电阻随溶液中乙醇含量的增加而增大;随着充放电循环的进行,电极/电解质界面的电荷转移电阻增大,电极的活性降低.

关键词: LiV3O8, 电化学特性, 硫酸锂-水-乙醇电解质

Abstract: The active material of LiV_(3)O_(8)prepared using low-temperature pre-reaction in solution followed by intermediate-temperature calcination at 450 ℃.The product was characterized by X-ray diffraction analysis and scanning electron microscope observation.The performance of LiV_(3)O_(8) electrode in neutral lithium sulfate-water-ethanol electrolytes was investigated using electrochemical methods.Galvanostatic charge/discharge results indicated that the specific capacity of LiV_(3)O_(8) electrode decreases with ethanol content increasing in electrolyte.The most appropriate water/ethanol volumetric ratio is 4 ∶1 in terms of conductivity of the electrolyte and stability of the electrode.AC impedance measurements demonstrated that the ohmic resistance of the electrolyte as well as the charge transfer resistance of the electrode/electrolyte interface increases with ethanol content increasing.

Key words: Lithium trivanadate, Electrochemical characteristics, Lithium sulfate-water-ethanol lectrolyte

中图分类号:

TM910.3

袁安保;宋维相;. LiV_3O_8电极在硫酸锂-水-乙醇电解质中的电化学性能研究(英文)[J]. 电化学（中英文）, 2006, 12(3): 250-256.

YUAN An-bao~. Investigations on Electrochemical Characteristics of LiV_(3)O_(8) Electrode in Lithium Sulfate-water-ethanol Electrolytes[J]. Journal of Electrochemistry, 2006, 12(3): 250-256.

导出引用管理器 EndNote|Ris|BibTeX

链接本文: https://electrochem.xmu.edu.cn/CN/

https://electrochem.xmu.edu.cn/CN/Y2006/V12/I3/250

参考文献

[1]Li Wu,Dahn J R,Wainwright D S.Rechargeable lithi-um batteries with aqueous electrolytes[J].Science,1994,264:1115~1118. [2]Li Wu,McKinnon W R,Dahn J R.Lithium intercala-tion from aqueous solutions[J].J.Electrochem.Soc.,1994,141(9):2310~2315. [3]Li Wu,Dahn J R.Lithium-ion cells with aqueous elec-trolytes[J].J.Electrochem.Soc.,1995,142(6):1742~1745. [4]Zhang Mei-jie,Dahn J R.Electrochemical lithium in-tercalation in VO2(B)in aqueous electrolytes[J].J.Electrochem.Soc.,1996,143(9):2730~2735. [5]Yang HQ,Li D P,Han S,et al.Vanadium-manganesecomplex oxides as cathode materials for aqueous solutionsecondary batteries[J].J.Power Sources,1996,58:221~224. [6]Yang Hui,Yang Hua-quan,Lu Yin-lin,et al.Re-search of Zn-Mn spinel electrode mateial for aqueoussecondary batteries[J].J.Power Sources,1996,62:223~227. [7]Wang Pei,Yang Hui,Yang Hua-quan.Electrochemicalbehavior of Li-Mn spinel electrode mateial in aqueoussolution[J].J.Power Sources,1996,63:275~278. [8]K hler J,Makihara H,Uegaito H,et al.LiV3O8:Characterization as anode material for an aqueous re-chargeable Li-ion battery system[J].Electrochim Ac-ta,2000,46:59~65. [9]Panero S,Pasquali M,Pistoia G.Rechargeable Li/Li1+xV3O8cells[J].J.Electrochem.Soc.,1983,130(5):1225~1227. [10]Pistoia G,Pasquali M,Wang G,et al.Li/Li1+xV3O8secondary batteries:synthesis and characterization ofan amorphous form of the cathode[J].J.Electro-chem.Soc.,1990,137(8):2365~2370. [11]West K,Zachau-Christiansen B,Skaarup S,et al.Comparison of LiV3O8cathode materials prepared bydifferent methods[J].J.Electrochem.Soc.,1996,143(3):820~825. [12]Kumagai N,Yu A.Ultrasonically treated LiV3O8as acathode material for secondary lithium batteries[J].J.Electrochem.Soc.,1997,144(3):830~834. [13]Dai Jin-xiang,Sam F Y L,Gao Zhi-qiang,et al.Low-temperature synthesized LiV3O8as a cathode materialfor rechargeable lithum batteries[J].J.Electrochem.Soc.,1998,145(9):3057~3062. [14]Kawakita J,Miura T,Kishi T.Charging characteris-tics of Li1+xV3O8[J].Solid State Ionics,1999,118:141~147. [15]Liu G Q,Zeng C L,Yang K.Study on the synthesisand properties of LiV3O8rechargeable lithium batteriescathode[J].Electrochim.Acta,2002,47:3239~3243. [16]Xie Jing-gang,Li Jin-xia,Zhan Hui,et al.Low-tem-perature sol-gel synthesis of Li1.2V3O8from V2O5gel[J].Mater.Lett.,2003,57:2682~2687. [17]Xu Hai-yan,Wang Hao,Song Zhi-qiang,et al.Novelchemical methode for synthesis of LiV3O8nanorods ascathode materials for lithium ion batteries[J].Electro-chim.Acta,2004,49:349~353. [18]Song Wei-xiang,Yuan An-bao,Zhao Jun.Electro-chemical properties of LiV3O8prepared by solutionmethod[J].Battery Bimonthly,2005,35(2):91~92.