一个3D交联金属有机框架 (MOF) 衍生聚合物电解质,用于无树的固态离子电池
Jia Zhou1, Xiao Wang1, Jifang Fu1
1Nano-Science & Technology Research Center, College of Sciences, Shanghai University, 99 Shangda Road, Shanghai, 200444, P. R. China.
Small (Weinheim an der Bergstrasse, Germany)
|December 14, 2023
概括
从金属有机框架 (MOF) 中获得的新型3D交联聚合物固体电解质提高了金属电池的安全性和性能. 这种材料有效地抑制了树的生长,使其能够长时间稳定地循环.
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
- 聚合物化学 聚合物化学
背景情况:
- 金属电池 (LMB) 提供高能量密度,但面临着树生长和安全方面的挑战.
- 在LMB中寻求固体电解质以提高机械强度,离子导电性和接口稳定性.
研究的目的:
- 开发一种由金属有机框架 (MOF) 衍生的3D交联聚合物固体电解质.
- 为了实现同时高机械强度和离子导电性,以提高LMB性能.
- 为了抑制树状石的形成,并提高电池的安全性和周期寿命.
主要方法:
- 合成一个包含MOFs的3D交联聚合物固体电解质.
- 电解质的机械性能,离子导电性和离子转移数的表征.
- 组装和测试对称电池和/P-PETEA-MOF/LiFePO4电池.
主要成果:
- 来自MOF的聚合物固体电解质表现出良好的机械和离子导电性质.
- 优化的MOF孔径和伊米达离子位限制了离子迁移,产生均的Li+流量和高转移数 (0.54).
- 三维交叉连接网络促进了Li+的快速移动,抑制了树突的生长,并在对称电池中实现了2000小时以上的稳定循环.
结论:
- 开发的3D MOF衍生聚合物固体电解质为安全和高性能金属电池提供了有前途的解决方案.
- 该材料的独特结构有效地解决了LMB技术的关键挑战,包括树岩形成和循环稳定性.
- 在实际的电池应用中,MOF衍生的聚合物固体电解质表现出卓越的长周期稳定性和可逆性.
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