锂离子电池磷酸钴锂正极材料制备及改性研究  

The preparation and modification of LiCo_(0.9)Fe_(0.1)PO_(4)/C for Li-ion battery cathode materials

作　　者：许寒[1] 刘慕霄 卢志威[1] XV Han;LIU Muxiao;LU Zhiwei(Tianjin Institute of Power Sources,Tianjin 300384,China;Naval Equipment Department the Second Military Representative Office in Tianjin,Tianjin 300384,China)

机构地区：[1]中国电子科技集团公司第十八研究所,天津300384 [2]海装驻天津地区第二军事代表室,天津300384

出　　处：《电源技术》2021年第5期566-568,共3页Chinese Journal of Power Sources

基　　金：国家重点研发计划专项资金资助(2016YFB-0901700)。

摘　　要：采用乙醇溶胶-凝胶工艺合成了LiCo_(0.9)Fe_(0.1)PO_(4)/C材料,该材料具有亚微米级粒度尺寸(100~200 nm),同时该材料表面被1 nm作用的碳层均匀包覆,经过电化学测试,未掺杂铁和已掺杂铁的样品分别具有131和143 mAh/g的比容量(0.05 C)。室温下,两种样品50次循环的容量保持率分别为82%和94%,55℃下经过50次循环,两种样品的保持率分别为43%和52%。It introduces the synthesis of LiCo_(0.9)Fe_(0.1)PO_(4)/C by ethanol sol-gel method.The material has sub micron size(100~200 nm),and the carbon layer on the surface of the material is uniformly coated by 1 nm.The electrochemical test results have shown that:the sample of LiCoPO4/C and LiCo_(0.9)Fe_(0.1)PO_(4)/C can deliver the specific capacities of 131 mAh/g and 143 mAh/g at the rate of 0.05 C(RT).The capacity retention is 82%and 94%after 50 cycles(55℃).

关 键 词：锂离子电池 正极材料 溶胶-凝胶法 

分 类 号：TM912[电气工程—电力电子与电力传动]