一个"三位一体"设计的-O2电池,参与缓释囊的氧化还原介质
Ying He1,2, Leyu Ding1,2, Jian Cheng1,2
1Soochow Institute for Energy and Materials Innovations, College of Energy, Soochow University, Suzhou, 215006, P. R. China.
Advanced materials (Deerfield Beach, Fla.)
|October 12, 2023
概括
非水性氧电池 (LOB) 的新设计使用独特的阴极催化剂和阳极保护层. 这种方法显著提高了下一代能源存储的能量密度和电池寿命.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 非水性氧电池 (LOB) 提供高能量密度,但面临诸如高充电过电和阳极降解等挑战.
- 现有的LOB配置需要对组件进行系统优化,以克服性能限制.
研究的目的:
- 通过解决阴极动力学,阳极稳定性和电解质限制,开发一套综合材料战略,以提高LOB性能.
- 研究一种新的"三位一体"设计,利用功能化的金属有机框架 (MOF) 实现同时的催化,保护和调解器释放作用.
主要方法:
- 用化聚烯浸的空洞MOF的制造,用于LOB中的多功能组件.
- 电化学表征,包括循环性能,放电/电荷偏振测量和容量保留.
- 在现场进行机制研究,以阐明过氧化物 (Li2O2) 的形成和分解途径.
主要成果:
- 设计的LOB表现出超低的放电/电荷偏振 (0.2V) 和1244小时的延长周期寿命.
- 实现了高总放电容量28.41 mAh cm-2.2.
- 证明了Li2O2的氧化还原介导溶液生长机制,增强了反应动力学和可逆性.
结论:
- "三位一体"设计有效地减轻了LOB中的关键问题,包括质量运输,氧化还原动力学和阳极腐蚀.
- 开发的材料战略为推进LOB技术向实际应用提供了一条途径.
- 这项工作为设计高性能能源存储系统的智能材料建立了新的范式.
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