石墨/Li(Ni_(1/3)Co_(1/3)Mn_(1/3))O_2电池高温储存后的性能变化  

The performance change of graphite/Li(Ni_(1/3)Co_(1/3)Mn_(1/3))O_2 cell after high temperature storage

作　　者：李佳[1] 刘浩涵[1] 谢晓华[1] 娄豫皖[1] 

机构地区：[1]中国科学院上海微系统与信息技术研究所,上海200050

出　　处：《电池》2010年第6期293-296,共4页Battery Bimonthly

基　　金：国家自然科学基金(20773157);中科院国防科技创新基金(CXJJ-09-M41);中科院上海微系统与信息技术研究所青年创新基金(2009QNCX07);上海市自然科学基金(09ZR1437600)

摘　　要：将以Li Ni1/3Co1/3Mn1/3O2为正极、石墨为负极的锂离子电池在不同荷电态(SOC)、55±2℃下储存250 d,研究了储存后电池综合性能的变化。高温储存后,电池的综合性能发生衰减,如开路电压、容量、充放电性能、循环性能及安全性降低,交流内阻升高,功率性能衰减。综合性能衰减的程度,随储存时电池SOC的升高而增大。Li-ion battery with LiNi1/3Co1/3Mn1/3O2 as cathode and graphite as anode was stored at 55±2 ℃ in different state of charge（SOC） for 250 d.The changes of general performance of the battery after storage were investigated.After storage at high temperature,the general performance of the battery degraded,such as decreasing of the open circuit voltage,capacity,charge-discharge performance,cycle performance and safety,increasing of accelerated rate calorimeter,decaying of power characteristics.With the increasing of SOC of the battery during storage,the performance of the battery degraded more aggravatingly.

关 键 词：锂离子电池 高温储存 荷电态(SOC) 安全性 

分 类 号：TM912.9[电气工程—电力电子与电力传动]