将剩余化合物转化为化接口,用于水稳定,可工业化预化微子-SiO阳极
Zhuo-Ya Lu1,2, Yu-Ming Zhao3, Di-Xin Xu1,2
1CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing 100190, P. R. China.
ACS applied materials & interfaces
|February 19, 2025
概括
研究人员开发了一种与水相容的化 (LiF) 涂层,用于离子电池 (LIB) 中的预化微型碳阳极 (Li-MSiO@C). 这种LiF层增强了实际应用的初始库伦比克效率和循环稳定性.
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:
- 微型碳 (MSiO@C) 阳极在高能量密度的离子电池 (LIB) 中面临挑战,包括初始库伦比效率 (ICE) 低,体积扩张显著,周期寿命低.
- 前化增强了ICE,但导致Li-MSiO@C材料对水分高度敏感,阻碍了工业采用.
研究的目的:
- 开发一种化学和电化学稳定的Li-MSiO@C阳极,以改善ICE和循环性能,用于实际的LIB应用.
- 为了解决预化基阳极的湿度敏感性.
主要方法:
- 在现场构建一个功能化 (LiF) 层在预先化微型碳 (Li-MSiO@C) 的表面,以形成Li-MSiO@C@LiF.
- 在半电池和袋电池中评估水相容性,ICE,可逆容量和循环稳定性.
主要成果:
- 这种Li-MSiO@C@LiF材料表现出极好的水相容性.
- 在半电池中实现了90.62%的高ICE和1356.5mA hg-1的可逆容量.
- 显示出出色的循环稳定性,在14.2 A h的袋式电池中经过1000个循环后保持80.3%的容量,达到305 W h kg-1的能量密度.
结论:
- LiF接口层有效地保护Li-MSiO@C阳极免受副作用和水分的影响.
- 富含LiF的固体电解质间相有助于强大的循环性能.
- 这种接口设计策略显示出稳定基于的阳极和推进高能量密度LIBs的前景.
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