江汉大学学报(自然科学版) ›› 2025, Vol. 53 ›› Issue (5): 53-60.doi: 10.16389/j.cnki.cn42-1737/n.2025.05.006

• 光电化学材料与器件研究 • 上一篇    

隔膜涂层对锂离子电池热失控影响研究

李英东1a,1b,陈灵勤1a,1b,周天健1a,1b,陈轲鼎1a,1b, 苟 斌2,杨 丽2,张 薇2,刘志宏*1a,1b,1c   

  1. 1. 江汉大学 a. 光电材料与技术学院,b. 光电化学材料与器件教育部重点实验室,c. 精细爆破全国重点 实验室,湖北 武汉 430056;2. 东风汽车集团有限公司研发总院,湖北 武汉 430058
  • 发布日期:2025-10-22
  • 通讯作者: 刘志宏
  • 作者简介:李英东(1999—),男,硕士生,研究方向:锂离子电池热失控行为分析。
  • 基金资助:
    江汉大学一流学科建设重大研究专项(2023XKZ012);江汉大学精细爆破国家重点实验室自主 课题(PBSKL2022102);东风汽车集团股份有限公司横向课题(ZH2023-143)

Impact of Separator Coating on Thermal Runaway of Lithium-ion Batteries

LI Yingdong1a,1b,CHEN Lingqin1a,1b,ZHOU Tianjian1a,1b,CHEN Keding1a,1b, GOU Bin2,YANG Li2,ZHANG Wei2,LIU Zhihong*1a,1b,1c   

  1. 1. a. School of Optoelectronic Materials & Technology,b. Key Laboratory of Optoelectronic Chemical Materials and Devices of Ministry of Education,c. State Key Laboratory of Precision Blasting,Jianghan University, Wuhan 430056,Hubei,China;2. Dongfeng Motor Corporation Research & Development Institute, Wuhan 430058,Hubei,China
  • Published:2025-10-22
  • Contact: LIU Zhihong

摘要: 以陶瓷和聚偏二氟乙烯(PVDF)两种涂层的PE隔膜为研究对象,对其表面形态、热稳定 性进行研究,并将其组装成软包电池,采用绝热加速量热仪(ARC)进行电池热失控测试。实验 结果表明:隔膜涂层有效延迟了电池热失控的发生,抑制了热失控反应的剧烈程度,其中PVDF 涂层隔膜有效约束了电池热失控初期的副反应,而陶瓷涂层隔膜在电池热失控中后期有更好的 抑制效果。因此,隔膜涂层对锂离子电池的热失控具有显著影响,其中无机陶瓷涂层能够更有效 地延缓热失控的发生。

关键词: 锂离子电池, 隔膜, 涂层, 热失控, 安全性

Abstract: In this study,two types of polyethylene(PE)separators coated with ceramic and polyvinylidene fluoride(PVDF) were investigated to assess their surface morphology and thermal stability. These separators were prepared into pouch batteries,and an adiabatic rate calorimeter(ARC)was employed to evaluate the thermal runaway behavior of the bat⁃ teries. The experimental results indicated that the separator coatings effectively delayed the onset of thermal runaway and mitigated the intensity of the thermal runaway reaction in lithi⁃ um-ion batteries. Specifically,the PVDF-coated separator effectively constrained the side reactions in the initial stage of battery thermal runaway,while the ceramic-coated separator demonstrated a superior inhibitory effect in the middle and later stages of battery thermal run⁃ away. Therefore,the coated separators have a significant impact on the thermal runaway be⁃ havior of lithium-ion batteries,with the inorganic ceramic coating being more effective in delaying the onset of thermal runaway.

Key words: lithium-ion battery, separator, coating, thermal runaway, safety

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