BF4- 根据以太基电解质的调整溶解化学,为离子充电电池构建稳定的电极/电解质接口
Xiaoli Yi1,2, Xinhai Li1,2,3, Jing Zhong1,2
1School of Metallurgy & Environment, Central South University, Changsha 410083, China.
ACS applied materials & interfaces
|February 26, 2024
概括
四博酸盐 (NaBF4) 通过改善阴极兼容性,增强了离子电池 (SIB) 的以太电解质. 这导致更稳定的无机丰富的阴极和固体电解质接口,提高电池性能.
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:
- 基于以太的电解质为离子电池 (SIB) 中的阳极提供了高性能.
- 然而,它们与阴极的兼容性仍然是一个重大挑战,限制了电池的整体效率.
- 开发稳定的阴极接口对于推进SIB技术至关重要.
研究的目的:
- 为了研究四博酸 (NaBF4) 作为盐或添加剂在以太电解质中对NFM//HC全细胞的有效性.
- 阐明NaBF4提高以太电解质和正极之间的兼容性的机制.
- 为了描述由此产生的阴极电解质接口 (CEI) 和固体电解质接口 (SEI) 层.
主要方法:
- 使用以太电解质与NaBF4和NaPF6.6一起制造和测试NFM//HC全细胞.
- 电化学性能评价. 电化学性能评价.
- 使用技术对CEI和SEI层进行分析,以探索形态,结构,组成和可溶性.
主要成果:
- 与NaPF6.6相比,含有NaBF4的以太电解质在NFM//HC全细胞中表现更好.
- NaBF4诱导了Na+和BF4之间的更强的相互作用,减少了Na+溶解,并促进了富含无机物CEI和SEI的形成.
- 鉴定证实,NaBF4导致含物种和无机物质的CEI和SEI层更稳定.
结论:
- NaBF4 作为有效的主盐或添加剂,可提高 SIB 中以太电解质的性能.
- 提高了CEI和SEI层的稳定性是由于NaBF4.4促进的独特相互作用.
- 本研究提出了一种可行的策略,以改善基于以太的SIB系统中的电解质-阴极兼容性.
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