烧结温度对LiNi_(0.8)Co_(0.2)O_2电化学性能的影响  

Effects of sintering temperature on electrochemical performance of LiNi_(0.8)Co_(0.2)O_2

作　　者：向小春[1] 刘兴泉[1] 刘宏基[1] 王超[1] 

机构地区：[1]电子科技大学微电子与固体电子学院,电子薄膜与集成器件国家重点实验室,四川成都610054

出　　处：《电池》2012年第4期189-192,共4页Battery Bimonthly

基　　金：国家自然科学基金项目(21071026);电子科技大学杰出人才引进计划资助项目(08JC00303)

摘　　要：采用共沉淀法合成正极材料LiNi0．8Co0．2O2，通过TG、XRD、循环伏安和充放电测试考察烧结温度对材料的影响。LiNi0．8Co0．2O2的结构和性能对烧结温度敏感，在空气气氛下第一、二段焙烧温度分别为700℃、750℃的产物，具有良好的α—NaFeO2层状结构，以0．2C在2．7～4．3V循环，首次放电比容量为152．2mAh／g，第20次循环的容量保持率为86．5％。Cathode material LiNi0.8Co0.2O2 was prepared by co-precipitation process. The effects of sintering temperature to the material were investigated by T G,XRD,cyclic vohammetry and charge/discharge tests. The structure and performance of LiNi0.8Co0.2O2 were sensitive to sintering temperature, the product had fine α-NaFeO2 layered structure when pre-sintered at 700 ℃ and siutered at 750 ℃ in air atmosphere. When cycled at 0.2 C in 2.7 - 4.3 V,its initial specific discharge capacity was 152.2 mAh/g, the capacity retention ratio was 86.5% in the 20th cycle.

关 键 词：锂离子电池 烧结温度 共沉淀法 LINI0.8CO0.2O2 电化学性能 

分 类 号：TM912.9[电气工程—电力电子与电力传动]