储能科学与技术2018，Vol.7Issue(4)：705-711,7.DOI:10.12028/j.isss.2095-4239.2018.0044
锂离子电池电极安全添加剂
Safety-enhancing electrode additives for Li-ion batteries
摘要
Abstract
Using α-Al2O3and Li2TiO3as safety additives in the positive and negative electrodes of Li-ion battery respectively, a mechanism model of safety additives has been proposed, and the effects of these two additives on the electrochemical performances and safety performances were investigated systematically. The electrochemical performance test results showed that energy density of Li-ion battery will reduce slightly as a result of safety additive; meanwhile, the rate performance is not affected. 82.3% capacity retention at 5C discharge rateis obtained and the battery’s cycle life is expected to reach 2409 times (calculated as 80% DOD) compared with 896 times of the control battery. The safety performance test results showed that the battery with electrode safety additives could pass strict safety tests such as punch test, shock test and external short circuit test. The presence of safety additives could avoid the occurrence of local hot spots inside the battery effectively and turn the uncontrollable internal short circuit into controllable low rate discharge, which improves the battery’s safety significantly, demonstrating a good application prospects in commercialization.关键词
锂离子电池/添加剂/安全性能/正极/负极Key words
Li-ion battery/ additive/ safety performance/ cathode/ anode分类
信息技术与安全科学引用本文复制引用
杨和山,夏悦,石玉磊..锂离子电池电极安全添加剂[J].储能科学与技术,2018,7(4):705-711,7.基金项目
广东省科技计划项目(2017B090907005). （2017B090907005）
