功能化γ-博伊米特共价接种改性聚乙烯用于离子电池分离器
Yuanxin Man1, Hui Nan1, Jianzhe Ma1
1Qinghai Provincial Key Laboratory of New Light Alloys, School of Mechanical Engineering, Qinghai University, Xining 810016, China.
Materials (Basel, Switzerland)
|May 11, 2024
概括
这项研究开发了使用boehmite/polydopamine/polyethylene的离子电池的稳定陶涂层分离器. 协同键增强电解质透和离子扩散,改善电池性能和循环寿命.
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:
- 离子电池中的常规聚烯烯分离器存在低点和电解质湿度差.
- 陶涂层隔离器正在引起人们的注意,以克服这些限制.
研究的目的:
- 为离子电池开发一种高效且稳定的陶涂层分离器.
- 为了研究共价接口修改对分离器性能的影响.
主要方法:
- 通过对聚乙烯 (PE) 表面对纳米化 (γ-AlOOH) 胡须进行共振连接,合成了一种博伊米特/多多巴胺/聚乙烯 (AlOOH-PDA-PE) 分离器.
- 加入聚多巴胺 (PDA) 来增强接口特性.
主要成果:
- 由于表面氨基基群,AlOOH-PDA-PE分离器显示了增强的电解质透和离子扩散.
- 在离子电池中,在5°C时达到126mAhg-1的放电容量.
- 显示出卓越的循环稳定性,在400个循环后保持97.1%的容量.
结论:
- 对共价接口的修改是一种有前途的策略,可以防止电池分离器中的陶涂层分层.
- 开发的AlOOH-PDA-PE分离器为离子电池提供了更好的稳定性和性能.
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