高性能金属电池通过金属有机框架通过自我调节的双层固体电解质介面加强
Jiaze Lv1,2,3,4, Qiannan Wang2,3,4,5, Mingwei OuYang1,2,3,4
1School of Energy Science and Engineering, University of Science and Technology of China, Hefei 230026, China.
ACS applied materials & interfaces
|July 23, 2024
概括
一种基于的新型金属有机框架纳米结构涂层 (ZMOF-NSC) 通过防止树突形成和增强离子传输,有效地稳定金属电池,从而使下一代能源存储的寿命更长,性能更好.
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
- 纳米技术纳米技术
背景情况:
- 金属电池具有高能量密度,但由于不稳定的固体电解质介相 (SEI) 和树突增长,限制了它们的实际使用.
- 开发稳定的阳极对于推进金属电池技术至关重要.
研究的目的:
- 为金属阳极设计一种保护性涂层,以提高电池的稳定性和性能.
- 研究涂层增强离子传输和SEI形成的机制.
主要方法:
- 制造一种基于的金属有机框架纳米结构涂层 (ZMOF-NSC).
- 用ZMOF-NSC涂层金属阳极.
- 对称和全金属电池的电化学测试 (Na$_{3}$V$_{2}$(PO$_{4}$) $_{3}$ZMOF-NSC@Na).
- 对离子传输,SEI特性和循环性能的分析.
主要成果:
- 采用的ZMOF-NSC涂层促进了均的沉积,并抑制了树岩的形成.
- 它促进了无机丰富的双层SEI的形成.
- 对称电池实现了超过2500小时的寿命.
- 充满电池在2000次10°C循环后显示81%的容量保留,并在3000次20°C循环后保持稳定.
- 实现了高能量密度 (370Wh kg$^{-1}$) 和功率密度 (10,484W kg$^{-1}$).
结论:
- 结构化的金属有机框架可以诱导稳定,双层的SEI,这对于无金金属电池至关重要.
- 采用ZMOF-NSC涂层,可以显著提高金属电池的耐用性和性能.
- 这种方法对更安全,更高效的金属电池的商业化具有前景.
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