镍钴锰三元材料-磷酸铁锂复合及性能研究  

Study on performance of Li(Ni_(1/3)Co_(1/3)Mn_(1/3))O_2/LiFePO_4 composite cathode for lithium-ion battery

作　　者：周智勇[1] 张松通 邱景义[1] 余仲宝[1] 杨裕生[1] 

机构地区：[1]防化研究院,北京100191

出　　处：《电源技术》2016年第11期2107-2109,共3页Chinese Journal of Power Sources

摘　　要：镍钴锰酸锂Li(Ni_(1/3)Co_(1/3)Mn_(1/3))O_2与磷酸铁锂按照一定的质量比球磨混合制得复合材料,电化学测试结果表明,电池的循环性能随着Li(Ni_(1/3)Co_(1/3)Mn_(1/3))O_2的增加而不断提升,当Li(Ni_(1/3)Co_(1/3)Mn_(1/3))O_2与LiFePO_4的质量比为7∶3时性能达到最佳,初始放电比容量为150.7 m Ah/g,循环60次后的放电比容量为147.6 m Ah/g,容量保持率高达97.96%;同时复合材料的平均工作电压为3.72 V(vs.Li+/Li),显著高于LiFePO_4的3.40 V(vs.Li+/Li)的放电电压平台,表现出更好的循环性能和更高的比容量。The different proportional mixtures with LiCo1/3Ni1/3Mn1/3O2 and sub-micro-sized LiFePO4 were used as cathode materials for lithium-ion battery. The results of charge-discharge tests show that the cyclic performance becomes better with the increase of LiCo1/3Ni1/3Mn1/3O2. The battery had better cyclic capability and higher power density when the rate of LiCo1/3Ni1/3Mn1/3O2 and LiFePO4 was 7 ： 3. Its initial discharge specific capacity was 150.7 mAh/g. After 60 times cycles, its specific capacity was 147.6 mAh/g, the capacity retention rate was 97.96%. And the average voltage was 3.72 V（vs.Li＋/Li）, significantly higher than the discharge voltage platform of LiFePO4 which was 3.40 V（vs. Li＋/Li）.

关 键 词：镍钴锰酸锂 磷酸铁锂 复合材料 锂离子电池 

分 类 号：TM912[电气工程—电力电子与电力传动]