水溶-蒸发法制备LiFePO4/C及电化学性能研究

doi:10.61558/2993-074X.2106

电化学（中英文） ›› 2013, Vol. 19 ›› Issue (2): 146-150. doi: 10.61558/2993-074X.2106

水溶-蒸发法制备LiFePO₄/C及电化学性能研究

古宁宇^*，何兴华，李洋

南昌大学化学系，江西南昌 330031

收稿日期:2012-02-17 修回日期:2012-03-19 出版日期:2013-04-28 发布日期:2012-03-29
通讯作者: 古宁宇 E-mail:nygu@ncu.edu.cn
基金资助:
江西省科技支撑项目（No. 2010BGB01001）及江西省教育厅科技项目（No. GJJ11278）资助

Electrochemical Performance of LiFePO₄/C Synthesized via Aqueous Solution-Evaporation Route

GU Ning-yu^*, HE Xing-hua，LI Yang

Department of Chemistry, Nanchang University, Nanchang 330031, Jiangxi, China

Received:2012-02-17 Revised:2012-03-19 Published:2013-04-28 Online:2012-03-29
Contact: GU Ning-yu E-mail:nygu@ncu.edu.cn

摘要/Abstract

摘要： 由LiH₂PO₄和FeC₂O₄.2H₂O作原料、柠檬酸为碳源，用水溶-蒸发法制备了LiFePO₄/C正极样品. 采用X射线衍射（XRD）、扫描电镜（SEM）和透射电镜（TEM）分析、观察样品. 用充放电曲线和电化学交流阻抗（EIS）谱图测试LiFePO₄/C电极. 结果表明，700 ^oC焙烧的LiFePO₄/C样品（碳量3.03%，by mass）结晶度高，无杂相，颗粒粒径100 nm，其表面包覆约5 nm碳层. 该电极0.5C、2C、5C和10C（1C = 170 mA.g^-1）倍率放电其比容量分别为148.2 mAh.g^-1、142.4 mAh.g^-1、127.4 mAh.g^-1和108.5 mAh.g^-1，循环寿命曲线稳定.

关键词: 锂离子电池, 正极材料, LiFePO₄/C, 柠檬酸

Abstract: The LiFePO₄/C samples have been synthesized via an aqueous solution-evaporation route with LiH₂PO₄, FeC₂O₄.2H₂O as raw materials and citric acid as a carbon source. X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) were used to analyze structure and morphology of the samples. The electrochemical performances of the LiFePO₄/C cathodes were characterized by charge/discharge cures and electrochemical impedance spectroscopy (EIS). The results show that the LiFePO₄/C sample, calcined at 700 °C and contained 3.03% (by mass) carbon, exhibited a highly pure crystalline phase with the primary particles sizes of 100 nm. The surfaces of those particles were covered by a carbon layer of 5 nm in thickness. At the rates of 0.5C, 2C, 5C, and 10C, where 1C corresponds to 170 mA.g^-1, the discharge capacities of 148.2, 142.7, 127.4, and 108.5 mAh.g^-1, were delivered, respectively, with the perfect cycling stabilities.

Key words: lithium-ion batteries, cathode material, LiFePO₄/C, citric acid

中图分类号:

O646

古宁宇, 何兴华, 李洋. 水溶-蒸发法制备LiFePO₄/C及电化学性能研究[J]. 电化学（中英文）, 2013, 19(2): 146-150.

GU Ning-yu, HE Xing-hua, LI Yang. Electrochemical Performance of LiFePO₄/C Synthesized via Aqueous Solution-Evaporation Route[J]. Journal of Electrochemistry, 2013, 19(2): 146-150.

参考文献

[1] Padhi A K, Nanjundaswamy K S, Goodenough J B. Phospho-olivines as positive-electrode materials for rechargeable lithium batteries[J]. Journal of the Electrochemical Society, 1997, 144(4): 1188-1194.
[2] Ravet N, Chouinard Y, Magnan J F, et al. Electroactivity of natural and synthetic triphylite[J]. Journal of Power Sources, 2001, 97-98: 503-507.
[3] Liu Y W, Zhang W, Wang H M, et al. Novel carbon source in manufacture of LiFePO4/C[J]. Advanced Materials Research, 2011, 189-193: 2731-2734.
[4] Kim J K, Cheruvally G, Ahn J H. Electrochemical properties of LiFePO4/C synthesized by mechanical activation using sucrose as carbon source[J]. Journal of Solid State Electrochemistry, 2008, 12(7/8): 799-805.
[5] Cheng F, Wan W, Tan Z, et al. High power performance of nano-LiFePO4/C cathode material synthesized via lauric acid-assisted solid-state reaction[J]. Electrochimica Acta, 2011, 56(8): 2999-3005.
[6] Yu L H (余丽红), Cao Y L (曹余良), Zhang X F (张晓飞), et al. Structure and electrochemical characteristics of LiFePO4 prepared by the polyacrylates-pyrolysis-reduction method for Li-ion batteries[J]. Journal of Electrochemistry (电化学), 2006, 11(4): 442-444.
[7] Oh S W, Myung S T, Oh S M, et al. Polyvinylpyrrolidone-assisted synthesis of microscale C-LiFePO4 with high tap density as positive electrode materials for lithium batteries[J]. Electrochimica Acta, 2010, 55(3): 1193-1199.
[8] Yu S X, Luo G E, Luo Y, et al. Physical and electrochemical properties of LiFePO4/C cathode material prepared from a new carbon source[J]. Advanced Materials Research, 2010, 160-162: 1654-1658.
[9] Pan F, Chen X, Li H, et al. Influence of carbon coating porosity on the electrochemical performance of LiFePO4 cathode[J]. Electrochemistry Communications, 2011, 13(7): 726-729.
[10] Dominko R, Bele M, Goupil J M, et al. Wired porous cathode materials: A novel concept for synthesis of LiFePO4[J]. Chemistry of Materials, 2007, 19(12): 2960-2969.
[11] Shi Z C (施志聪), Li C (李晨), Yang Y (杨勇). The electrochemical performance studies on novel LiFePO4 cathode materials for Li ion batteries[J]. Journal of Electrochemistry (电化学), 2003, 9(1): 9-14.
[12] Zhang S S, Allen J L, Xu K, et al. Optimization of reaction condition for solid-state synthesis of LiFePO4-C composite cathodes[J]. Journal of Power Sources, 2005, 147(1/2): 234-240.
[13] Xie H (谢辉), Zhou Z T (周震涛). The synthesis, structure and electrochemical performances of lithium iron phosphate[J]. Journal of Electrochemistry (电化学), 2006, 12(4): 378-381.
[14] Lu C Z, Fey G T K, Kao H M. Study of LiFePO4 cathode materials coated with high surface area carbon[J]. Journal of Power Sources, 2009, 189(1): 155-162.
[15] Yu F, Zhang J, Yang Y, et al. Reaction mechanism and electrochemical performance of LiFePO4/C cathode materials synthesized by carbothermal method[J]. Electrochimica Acta, 2009, 54(28): 7389-7395.
[16] Huang B, Zheng X, Jia D, et al. Design and synthesis of high-rate micron-sized, spherical LiFePO4/C composites containing clusters of nano/microspheres[J]. Electrochimica Acta, 2010, 55(3): 1227-1231.
[17] Zhou W J, He W, Li Z M, et al. Biosynthesis and electrochemical characteristics of LiFePO4/C by microwave processing[J]. Journal of Solid State Electrochemistry, 2009, 13(12): 1819-1823.
[18] Tang C P (唐昌平), Ying J R (应皆荣), Lei M (雷敏), et al. High density LiFePO4/C synthesized by controlled crystallization and microwave carbon thermal reduction[J]. Journal of Electrochemistry (电化学), 2006, 12(2): 188-190.
[19] Jin B, Gu H B, Zhang W, et al. Effect of different carbon conductive additives on electrochemical properties of LiFePO4-C/Li batteries[J]. Journal of Solid State Electrochemistry, 2008, 12(12): 1549-1554.
[20] Liu Y, Cao C, Li J. Enhanced electrochemical performance of carbon nanospheres–LiFePO4 composite by PEG based sol–gel synthesis[J]. Electrochimica Acta, 2010, 55(12): 3921-3926.
[21] Yang M R, Teng T H, Wu S H. LiFePO4/carbon cathode materials prepared by ultrasonic spray pyrolysis[J]. Journal of Power Sources, 2006, 159(1): 307-311.
[22] Yuan L X, Wang Z H, Zhang W X, et al. Development and challenges of LiFePO4 cathode material for lithium-ion batteries[J]. Energy & Environmental Science, 2011, 4(2): 269.
[23] Dominko R, Bele M, Gaberscek M, et al. Impact of the carbon coating thickness on the electrochemical performance of LiFePO4/C composites[J]. Journal of the Electrochemical Society, 2005, 152(3): A607-A610.

水溶-蒸发法制备LiFePO₄/C及电化学性能研究

Electrochemical Performance of LiFePO₄/C Synthesized via Aqueous Solution-Evaporation Route

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