一个高热稳定性的分离器,抑制树突的生长,用于间位稳定的离子电池
Liying Cheng1, Xinru Zhang1, Yukun Cao1
1State Key Laboratory of Fire Science,University of Science and Technology of China, Hefei, Anhui 230026, China.
Journal of colloid and interface science
|October 13, 2025
概括
一个新的复合材料分离器,ANF@MMT,通过防止树的生长来提高离子电池的安全性. 这种先进的材料提供了更好的热稳定性和容量保留,减少了短路和热失控的风险.
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
- 电池技术 电池技术
背景情况:
- 商用聚烯分离器存在热不稳定性,湿透性差,树抑制不充分,导致电池短路和热失控等安全隐患.
- 开发先进的分离器对于提高离子电池的安全性和性能至关重要.
研究的目的:
- 设计和评估一种新型的复合材料分离器,ANF@MMT,集成阿拉米德纳米纤维 (ANF) 和MMT粘土纳米粒子.
- 为了改善电池分离器的孔隙结构,热稳定性和树抑制能力.
- 提高离子电池的整体安全性和电化学性能.
主要方法:
- 通过整合ANF纳米纤维和MMT粘土纳米粒子制造ANF@MMT复合材料分离器.
- 分离器的孔隙结构,热稳定性和湿透性的特征.
- 使用ANF@MMT分离器对离子电池进行电化学测试,包括循环稳定性和容量保留测量.
- 通过热失控测试和点火时间测量进行安全评估.
主要成果:
- 复合材料分离器ANF@MMT表现出改善的孔隙结构,并保持出色的热稳定性.
- 在循环时,ANF@50MMT分离器有效地抑制了树的生长.
- 铁// (LFP//Li) 半电池与ANF@50MMT在300个循环后实现了95.2%的容量保留,超过商业Celgard2325 (87.04%).
- 与ANF@50MMT组装的袋式电池显示,与商业分离器相比,点火时间 (68秒) 显著延迟.
结论:
- 复合材料分离器ANF@MMT为提高离子电池安全性和性能提供了一个有前途的解决方案.
- 整合ANF纳米纤维和MMT粘土纳米颗粒有效地解决了传统分离器的局限性.
- 这种先进的分离器设计有助于树抗性,提高离子导电性和卓越的热稳定性,为更安全的能量存储设备铺平了道路.
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