锂离子电池电极安全添加剂

doi:10.12028/j.isss.2095-4239.2018.0044

储能科学与技术 ›› 2018, Vol. 7 ›› Issue (4): 705-711.doi: 10.12028/j.isss.2095-4239.2018.0044

锂离子电池电极安全添加剂

杨和山^1,3, 夏悦², 石玉磊²

1. 东莞市致格电池科技有限公司, 广东东莞 523651;
2. 深圳市清新电源研究院, 广东深圳 518071;
3. 福建省致格新能源电池科技有限公司, 福建三明 365300

收稿日期:2018-03-26 修回日期:2018-04-28 出版日期:2018-07-01 发布日期:2018-05-16
通讯作者: 夏悦,助理研究员,研究方向为锂离子电池,E-mail:xiayue@sztspi.com
作者简介:杨和山(1982-),男,硕士,工程师,研究方向为高性能锂离子电池产品的系统开发,E-mail:yanghs10@126.com
基金资助:
广东省科技计划项目（2017B090907005）。

Safety-enhancing electrode additives for Li-ion batteries

YANG Heshan^1,3, XIA Yue², SHI Yulei²

1. Dongguan General Exploring Battery Technology Co., Ltd, Dongguan 523651, Guangdong, China;
2. Tsingsun Power Institute of Shenzhen, Shenzhen 518071, Guangdong, China;
3. Fujian General Exploring Battery Technolgy Co., Ltd., Sanming 365300, Fujian, China

Received:2018-03-26 Revised:2018-04-28 Online:2018-07-01 Published:2018-05-16

摘要/Abstract

摘要： 分别以α-Al₂O₃和Li₂TiO₃作为锂离子电池正极和负极中的安全添加剂，提出了安全添加剂的作用模型，系统比较了有无安全添加剂的两组电池的电化学性能和安全性能。电化学性能测试结果表明，安全添加剂的加入会很小幅度降低锂离子电池的能量密度；电池的倍率性能不受影响，其在5 C放电倍率时容量保持率达到82.3%（以1 C为基准）；电池的预期循环寿命达2409次（按照80% DOD计算），相比对比组电池的896次预算寿命大幅增加。安全性能测试结果表明，添加了安全添加剂的电池能够通过严苛的穿刺测试、重物撞击测试和外短路测试等安全测试，安全添加剂的存在可以有效避免电池内部局部热点的产生，使不可控的内部短路转变为可控的低倍率放电，显著提高电池的安全性能，在商业化方面展示出良好的应用前景。

关键词: 锂离子电池, 添加剂, 安全性能, 正极, 负极

Abstract: sing α-Al₂O₃ and Li₂TiO₃ as 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.

Key words: Li-ion battery, additive, safety performance, cathode, anode

中图分类号:

TM911

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.

YANG Heshan, XIA Yue, SHI Yulei. Safety-enhancing electrode additives for Li-ion batteries[J]. Energy Storage Science and Technology, 2018, 7(4): 705-711.

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锂离子电池电极安全添加剂

Safety-enhancing electrode additives for Li-ion batteries

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