大功率LiFePO4/C复合材料的简易合成

doi:10.61558/2993-074X.2928

电化学（中英文） ›› 2012, Vol. 18 ›› Issue (4): 337-341. doi: 10.61558/2993-074X.2928

• 化学电源近期研究专辑（武汉大学杨汉西教授主编） • 上一篇下一篇

大功率LiFePO₄/C复合材料的简易合成

张鹏¹, 孔令斌^1,2*, 罗永春², 康龙²

1. 兰州理工大学甘肃省有色金属新材料省部共建国家重点实验室, 甘肃兰州 730050； 2. 兰州理工大学材料科学与工程学院，甘肃兰州730050

收稿日期:2011-11-24 修回日期:2012-02-27 出版日期:2012-08-28 发布日期:2012-03-03
通讯作者: 孔令斌 E-mail:konglb@lut.cn
基金资助:
国家自然科学基金项目（No. 21163010）资助

A Facile Approach to Prepare LiFePO₄/C Composite with High-Rate Performance

ZHANG Peng¹, KONG Ling-Bin^1,2*, LUO Yong-Chun², KANG Long²

1. State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials, Lanzhou University of Technology, Lanzhou 730050; 2. School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, Gansu China

Received:2011-11-24 Revised:2012-02-27 Published:2012-08-28 Online:2012-03-03
Contact: KONG Ling-Bin E-mail:konglb@lut.cn

摘要/Abstract

摘要： 本文应用碳热还原法，以廉价的FeCl₃.6H₂O、LiOH.H₂O和NH₄H₂PO₄为原料，以淀粉为还原剂和碳源，经600 ^oC烧结制备了LiFePO₄/C复合材料，方法重现性好且易规模化. 采用X射线衍射（XRD）、扫描电镜（SEM）和透射电镜（TEM）测试材料结构，观察材料形貌. 结果表明，经600 ^oC烧结10 h所得产物具有纯相的橄榄石型晶体结构、良好的结晶性和规整的球状形貌，粒径为60 ~ 100 nm，包覆LiFePO4晶粒的碳层厚度为2 nm左右，碳含量为5%（by mass）. 材料的振实密度高达1.3 g.cm^-3，在0.2C倍率下首次放电比容量为162 mAh.g^-1，在0.5C、1C、2C、5C和10C倍率下首次放电比容量分别为143、135、127、116和105 mAh.g^-1，10C倍率下500周期循环，其比容量仍有81 mAh.g^-1.

关键词: 锂离子电池, 正极材料, LiFePO4/C, 核-壳结构

Abstract: The LiFePO₄/C composite electrode material was synthesized by a moderate in situ carbothermal reduction method at 600 °C using FeCl₃.6H₂O, LiOH.H₂O, and NH₄H₂PO₄ as starting materials, soluble starch sol as a carbon source and a reducing agent. This method is readily reproducible and possibly feasible to carry out large-scale synthesis. The structure and morphology of the LiFePO₄/C samples were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The synthesized LiFePO₄/C composite was in pure phase of olivine-type, shows highly crystalline and spherical morphology with the particle sizes in the range of 60 ~ 100 nm. The thickness of the carbon film could be as thin as about 2 nm for the isolated LiFePO₄/C particles, and the amount of carbon introduced into the composite was about 5% (by mass). The measured tap density of LiFePO₄/C composite was as high as 1.3 g.cm^-3 and the initial discharge capacities of LiFePO₄/C composite reached 162, 143, 135, 127, 116 and 105 mAh?g-1 at 0.2C, 0.5C, 1C, 2C, 5C and 10C rates, respectively. Remarkably, even after 500 cycles at 10C, the capacity of 81 mAh.g^-1 could be obtained.

Key words: Li ion battery, cathode materials, LiFePO4/C, core-shell structure

中图分类号:

张鹏, 孔令斌, 罗永春, 康龙. 大功率LiFePO₄/C复合材料的简易合成[J]. 电化学（中英文）, 2012, 18(4): 337-341.

ZHANG Peng, KONG Ling-Bin, LUO Yong-Chun, KANG Long. A Facile Approach to Prepare LiFePO₄/C Composite with High-Rate Performance[J]. Journal of Electrochemistry, 2012, 18(4): 337-341.

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链接本文: https://electrochem.xmu.edu.cn/CN/10.61558/2993-074X.2928

https://electrochem.xmu.edu.cn/CN/Y2012/V18/I4/337

参考文献

[1]Wang B G (王保国), Wang X Y (王先友), Shu H P (舒洪波), et al. Electrochemical performance of LiFePO4/C cathode materials synthesized by solid-state reaction[J]. The Chinese Journal of Nonferrous Metals(中国有色金属学报), 2010, 20(12): 2351-2356.
[2] 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.
[3] Yonemura M, Yamada A, Takei Y, et al. Comparative kinetic study of olivine LixMPO4 (M = Fe, Mn)[J]. Journal of the Electrochemical Society, 2004, 151(9): A1352- A1356.
[4] Pier P P, Marla C, Silvera S, et al. Long-term cyclability of nanostructured LiFePO4[J]. Electrochimica Acta, 2003, 48(28):4205-4211.
[5] Liu Y Y, Cao C B, Li J. Enhanced electrochemical performance of carbon nanospheres-LiFePO4 composite by PEG based sol-gel synthesis[J]. Electrochimica Acta, 2010, 55(12):3921-3926.
[6] Xia X, Wang Z X, Chen L Q. Regeneration and characterization of air-oxidized LiFePO4[J]. Electrochemistry Communications, 2008, 10(10):1442-1444.
[7] Zou H, Zhang G, Shen P. Hydrothermal reduction synthesis of LiFePO4 and its electrochemical performance [J]. Electrochemistry, 2010, 4(16): 416-419.
[8] Wang Z X(王兆翔), Chen L Q(陈立泉). Research progress of cathode materials for lithium ion batteries[J]. Chinese Journal of Power Sources(电源技术), 2008, 32(5): 287-292.
[9] Prosini P P, Lisi M, Zane D, et a1. Determination of the chemical diffusion coefficient of lithium in LiFePO4[J]. Solid State Ionics, 2002, 148(1/2): 45-51.
[10] Wang Y G, Wang Y R, Hosono E, et al. The design of a LiFePO4/Carbon nanocomposite with a core-shell structure and its synthesis by an in situ polymerization restriction method[J]. Angewandte Chemie International Edition, 2008, 47(39): 7461- 7465.
[11] Wu Y M, Wen Z H, Li J H. Hierarchical carbon-coated LiFePO4 nanoplate microspheres with high electrochemical performance for Li-Ion batteries[J]. Advanced Materials, 2011, 23(9): 1126-1129.
[12] Islam M S, Driscoll D J, Fisher C A J, et al. Atomic-scale investigation of defects, dopants, and lithium transport in the LiFePO4 olivine-type battery material[J]. Chemistry of Materials, 2005, 17(20):5085-5092.
[13] Huang Y H, Ren H B, Yin S Y, et al. Synthesis of LiFePO4/C composite with high-rate performance by starch sol assisted rheological phase method[J]. Journal of Power Sources, 2010, 195(2): 610-613.
[14] Yu W L, Zhao Y P, Rao Q L. Rapid and continuous production of LiFePO4/C nanoparticles in super heated water [J]. Chinese Journal of Chemical Engineering, 2009, 17(1) 171-174.
[15] Lan Y C, Wang X D, Zhang J W, et al. Preparation and characterization of carbon-coated LiFePO4 cathode materials for lithium-ion batteries with resorcinol-formaldehyde polymer as carbon precursor[J]. Powder Technology, 2011,212(2): 327-331.
[16] Choa Y, George Ti F, Kao H. The effect of carbon coating thickness on the capacity of LiFePO4/C composite cathodes[J]. Journal of Power Sources, 2009, 189(1): 256- 262.
[17] Wang G X, Liu H, Liu J, et al. Mesoporous LiFePO4/C nanocomposite cathode materials for high power lithium ion batteries with superior performance[J]. Advanced Materials, 2010, 22(44):4944-4948.

大功率LiFePO₄/C复合材料的简易合成

A Facile Approach to Prepare LiFePO₄/C Composite with High-Rate Performance

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