基于SIS的静电旋转高安全离子电池分离器
Liping Tang1,2, Zhiqiang Lei1,2, Yankang Wu1,2
1Department of Materials Science and Engineering, Sichuan University of Science and Engineering, 643000 Zigong, Sichuan, P. R. China.
Langmuir : the ACS journal of surfaces and colloids
|September 14, 2023
概括
这项研究开发了一种新型的离子电池 (LIB) 自闭分离器,使用聚乙烯-异乙烯 (SIS) 和聚烯 (PAN). 增强的分离器提供了更好的热稳定性和安全性,这对于先进的电池性能至关重要.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 聚合物科学 聚合物科学
背景情况:
- 分离器特性极大地影响离子电池 (LIB) 的容量,寿命和安全性.
- 提高隔离器的热稳定性和机械强度是更安全的LIB的关键.
- 热塑性弹性体如聚乙烯-异乙烯 (SIS) 具有提高分离器性能的潜力.
研究的目的:
- 探索使用SIS的不同块比,以提高交联聚烯 (PAN) 膜的热稳定性和机械强度.
- 为了研究在热应力下开发的分离器的自闭行为.
- 为了评估使用新型分离器的LIBs的电化学性能.
主要方法:
- 使用化交叉连接和热处理,用SIS修改PAN膜.
- 进行拉伸强度测试以评估机械性能.
- 与商业Celgard 2400相比,与开发的分离器使用LIBs评估了电化学性能.
主要成果:
- S/PAN/SIS-4019分离器表现出自我关闭的行为,有效地管理了热失控.
- 拉力强度达到了17.49 MPa,超过了Celgard 2400等商业分离器.
- 使用S/PAN/SIS-4019分离器的LIB显示出优越的电化学性能.
结论:
- 交联的SIS/PAN分离器具有增强的热稳定性和机械强度.
- 自动关闭机制提供了一个关键的安全功能,防止热失控.
- 开发的分离器显著提高了离子电池的整体性能和安全性.
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