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电化学(中英文) ›› 2015, Vol. 21 ›› Issue (5): 459-464.  doi: 10.13208/j.electrochem.150746

• 电化学储能应用及产业化近期研究专辑 (厦门大学 赵金保教授主编) • 上一篇    下一篇

具有热关断涂层的锂电池隔膜性能表征

白 莉1,怀永建1*,艾新平2,贾 海1   

  1. 1. 中航锂电(洛阳)有限公司,河南 洛阳 471003;2. 武汉大学化学与分子科学学院,湖北 武汉 430072
  • 出版日期:2015-10-28 发布日期:2015-10-28
  • 通讯作者: 怀永建 E-mail:huaiyongjian@126.com

Characterization of the Separator with Thermal-Shutdown Layer for Use in Lithium Batteries

BAI Li1, HUAI Yong-jian1*, AI Xin-ping2, JIA Hai1   

  1. 1.China Aviation Lithium Battery Co., Ltd., Luoyang 471003, Henan, China; 2. Department of Chemistry, Wuhan University, Wuhan 430072, Hubei, China
  • Published:2015-10-28 Online:2015-10-28
  • Contact: HUAI Yong-jian E-mail:huaiyongjian@126.com

摘要:

介绍了一种具有热关断涂层的锂电池功能隔膜,利用热关断涂层的耐热特点来降低隔膜的热闭孔温度,当电池内部达到一定的温度时,涂层迅速熔化并覆于极片和隔膜之间,形成绝缘层,阻止锂离子的进一步传输,从而提高锂离子电池的安全性. 实验表明,热关断涂层表观均匀,对电池的内阻、倍率性能和循环性能没有不良影响. 电池的安全测试表明,该功能隔膜可表现出优异的安全防护作用.

关键词: 隔膜, 热关断温度, 锂离子电池, 安全性

Abstract:

In this paper, the lithium ion battery coated with the thermal-shutdown functional layer has been introduced. The shutdown temperature of the separator could be decreased by using the melting point of thermal-shutdown functional layer. When the internal battery environment reached a critical temperature, the functional layer melted and coated the anode/separator with a non-conductive barrier, halting Li-ion transport and shutting down the cell permanently. The results showed that the functional layer did not affect the resistance, rate performance and cycle life. It was found the functional layer can significantly improve the safety of the battery when misused.

Key words: separator, shutdown temperature, lithium battery, safety

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