制造电聚乙醇-胺无膜复合分离器用于高功率离子电池
Xiao-Wei Wu1,2, Manojkumar Seenivasan1, Chelladurai Karuppiah1
1Battery Research Center of Green Energy, Ming Chi University of Technology, New Taipei City, 24301, Taiwan, R.O.C.
Heliyon
|July 31, 2024
概括
这项研究开发了一种用于离子电池的新型复合分离器,使用电聚乙醇-胺和聚乙烯化物. 新的分离器提高了安全性和性能,为储能提供了更好的耐用性.
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
- 储能 储能 储能 储能 储能 储能
背景情况:
- 商业离子电池分离器的热稳定性不佳,造成安全风险.
- 高压电池系统需要先进的分离器,以提高安全性和导电性.
研究的目的:
- 为离子电池开发一种高安全性的复合膜.
- 为了提高热稳定性和离子导电性,使用电聚合物和浸泡涂层.
主要方法:
- 使用电聚乙醇-胺 (PVAM) 和聚乙烯化物 (PVDF) 通过浸泡涂层制造复合材料分离器.
- 评价分离器的性能,包括电解质吸收,湿透性,热稳定性,多孔性,电化学稳定性和离子导电性.
- 在半电池中使用富含Ni的NCM811阴极对传统聚乙烯分离器进行性能测试.
主要成果:
- 1%的PVDF@Esp-PVAM复合分离器显示出非常好的湿透性和7.75 × 10−4 S cm−1.1的离子导电性.
- 复合材料分离器表现出卓越的循环稳定性,在1C/1C的100个循环后保持93.4%的容量,而PE分离器的容量为84.8%.
- 开发的分离器显著优于传统的半电池分离器,具有富含Ni的NCM811阴极.
结论:
- 1%的PVDF@Esp-PVAM复合分离器显示出显著的潜力,可以提高离子电池的长期耐用性和高速率性能.
- 这种新型分离器是需要高安全性和高效率的先进储能应用的有希望的候选者.
- 该研究强调了将电PVAM与下一代电池分离器的PVDF涂层相结合的有效性.
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