[1]莫祥银,冯晓叁,俞琛捷,等.聚羧酸对LiFePO_4正极材料结构和性能的影响[J].南京师大学报(自然科学版),2012,35(01):58-62.
　Mo Xiangyin,Feng Xiaosan,Yu Chenjie,et al.Effect of Polycarboxylate on Structure and Performance of LiFePO4 Cathode Material[J].Journal of Nanjing Normal University(Natural Science Edition),2012,35(01):58-62.
点击复制

聚羧酸对LiFePO_4正极材料结构和性能的影响()
分享到：

《南京师大学报（自然科学版）》[ISSN:1001-4616/CN:32-1239/N]

卷:
第35卷
期数:
2012年01期
页码:
58-62
栏目:
化学
出版日期:
2012-03-20

文章信息/Info

Title:
Effect of Polycarboxylate on Structure and Performance of LiFePO4 Cathode Material
作者:
莫祥银1; 冯晓叁1; 俞琛捷1; 丁毅2; 康彩荣2; 倪聪2
( 1． 南京师范大学分析测试中心，江苏南京210046) ( 2． 南京工业大学材料科学与工程学院，江苏南京210009)
Author(s):
Mo Xiangyin1; Feng Xiaosan1; Yu Chenjie1; Ding Yi2; Kang Cairong2; Ni Cong2
1.Analysis and Testing Center,Nanjing Normal University,Nanjing 210046,China
关键词:
锂离子电池; 正极材料; LiFePO4 ; 聚羧酸; 包覆
Keywords:
lithium rechargeable batteries; cathode material; lithium iron phosphate; polycarboxylate; coating
分类号:
TM912.9
摘要:
为了改善磷酸铁锂的电化学性能,以碳酸锂、草酸亚铁、磷酸二氢铵为原料,聚羧酸为碳源,用两步球磨高温固相法合成了锂离子电池正极LiFePO4/C复合材料.讨论了聚羧酸含量对LiFePO4/C的结构和性能的影响.一方面,用X射线衍射、扫描电子显微镜/X-射线能谱仪等方法研究了聚羧酸对LiFePO4/C晶体结构和表面形貌的影响.另一方面,用电化学方法研究了聚羧酸对LiFePO4/C的充放电性能和循环稳定性的影响.研究结果表明:聚羧酸作为碳源包覆合成的LiFePO4/C具有单一的橄榄石结构,颗粒大小均匀,具有良好的
Abstract:
In order to improve the electrochemical performance of LiFePO4 ，LiFePO4 /C cathode material was synthesized for lithium rechargeable batteries by two step ball-milling and high temperature solid-state reaction，using Li2CO3 ， FeC2O4·2H2O，( NH4 ) 2HPO4 as raw materials and polycarboxylate as carbon source． The effect of different contents of polycarboxylate on the structure and performance of the samples was discussed． On the one hand，the effect of polycarboxylate on crystal structure and surface morphology of LiFePO4 /C composite material was investigated by using X-ray diffraction，and scanning electron microscope /X-ray energy dispersive spectroscopy． On the other hand，electrochemical measurements were used to study the effect of polycarboxylate on charge /discharge performance and cycle stability of LiFePO4 /C composite material． The results indicated that the prepared samples by coating polycarboxylate had single olivine structures and uniform particle sizes，and exhibited excellent electrochemical performances and enhanced stabilities． Among them，the product with polycarboxylate content of 10wt． % showed the best specific discharge capacity and cycle performance，and its first specific discharge capacity was 130. 6 mAh /g at 0. 1C．

参考文献/References:

［1］ Padhi A K，Nanjundaswamy K S，Goodenough J B． Phospho-olivines as positive-electrode materials for rechargeable lithium batteries ［J］． J Electrochem Soc，1997，144( 4) : 1 188-1 194．
［2］ 倪聪，莫祥银，俞琛捷，等． 纳米磷酸铁锂的研究进展［J］． 化工新型材料，2010，38( 5) : 1-4．
［3］ 康彩荣，沈丽娜，丁毅，等． 锂离子电池正极材料锰酸锂的制备与改性研究［J］． 无机盐工业，2009( 2) : 10-13．
［4］ Belharouak I，Johnson C，Amine K． Synthesis and electrochemical analysis of vapor-deposited carbon-coated LiFePO4 ［J］． Electrochemistry Communications，2005，7: 983-988．
［5］ 康彩荣，莫祥银，丁毅，等． 两步合成法制备LiFePO4-C 复合材料及其性能［J］． 材料导报，2009，23( 5) : 320-321， 333．
［6］ Park K S，Son J T，Chung H T，et al． Surface modification by silver coating for improving electrochemical properties of LiFe- PO4 ［J］． Solid State Communications，2004，129: 311-314．
［7］ Fei Gao，Tang Zhiyuan，Xue Jianjun． Effects of different iron sources on the performance of LiFePO_4 /C composite cathode materials［J］． Journal of University of Science and Technology， 2008， 15( 6) : 802
［8］ 康彩荣，莫祥银，丁毅，等． 锂离子电池正极材料LiFe1-2xMnxMgxPO4 /C 的电化学性能研究［J］． 功能材料，2010，41 ( 2) : 208-210．
［9］ 康彩荣，莫祥银，丁毅，等． 锰离子掺杂磷酸铁锂的制备与电化学性能研究［J］． 电子显微学报，2009，28( 特刊) : 72．
［10］ Lee S B，Cho S H，Cho S J，et al． Synthesis of LiFePO4 material with improved cycling performance under harsh conditions ［J］． Electrochemistry Communications，2008，10: 1 219-1 221．

备注/Memo

备注/Memo:
基金项目:国家“973”项目( 6134501ZT01-004-02) 、江苏省自然科学基金项目( 2007191SB90098) 、德意志学术交流基金项目( DAAD Section 423-China，Mongolia) ．
通讯联系人:莫祥银，博士，教授，研究方向: 应用化学． E-mail: moxiangyin@ njnu． edu． cn
更新日期/Last Update: 2013-03-11