基于二元金属有机框架的半固体电解质中的双离子通路使金属电池在极高温度下能够稳定运行
Minh Hai Nguyen1, Nhat Minh Ngo1, Byung-Kook Kim2
1Department of Materials Science and Engineering, Chungnam National University, Daejeon, 34134, Republic of Korea.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|September 23, 2024
概括
这项研究开发了一种新的半固态电解质,使用金属有机框架为高性能金属电池. 这种新材料确保了稳定和安全的电池运行,即使在极端温度下.
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:
- 电子行业要求先进的储能解决方案,具有高能量密度和安全性,特别是用于高温应用.
- 当前的金属电池 (LMB) 在恶劣条件下面临热稳定性和操作安全方面的挑战.
研究的目的:
- 为了合成一种新的半固态电解质 (SSSE) 用于使用金属有机框架 (MOFs) 作为等级宿主为LMBs.
- 为了提高SSSE的热稳定性,电化学窗口和离子导电性,用于高温电池应用.
主要方法:
- 将MOF与等级孔结构集成在一起,以容纳液体电解质 (LE).
- 电化学激活以在MOF孔内捕获微量LE.
- 使用开发的SSSE在高温下制造和测试Li//LiFePO4电池.
主要成果:
- 基于MOF的SSSE显示出高热稳定性和延长的电化学窗口 (5.25V与Li/Li+).
- 获得了强大的离子导电能力 (2.04 × 10-4 S cm-1),归因于层次的孔隙结构.
- Li//LiFePO4 电池表现出良好的容量保留 (97%在95°C和1°C的100个循环后).
结论:
- 层次的MOF结构有效地促进了离子的存储和运输,提高了SSSE的性能.
- 开发的SSSE可使LMB在极高温度下稳定安全运行.
- 这项研究促进了对基于MOF的SSSE中的离子传输的理解,并有助于高温LMB的开发.
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