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对于高含硫全固态硫电池的协同界面优化

BoSheng Zhao¹, Chang Zhou¹, Peng Chen¹

¹Institute of New Energy Material Chemistry, School of Materials Science and Engineering, Nankai University, Tianjin 300350, China.

ACS applied materials & interfaces

|January 19, 2024

概括

这项研究通过优化与双合电解质和合金硫主体的接口来增强全固态硫电池 (ASSLSB). 这种方法显著提高了高硫含量电池的能量密度和性能.

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:

在全固态硫电池 (ASSLSB) 中实现高能量密度需要增加硫含量.
ASSLSB中的复杂接口限制了性能,特别是在高硫负载的情况下.
现有的单一方法不足以同时优化这些关键接口.

研究的目的:

制定一个协同战略,以提高高硫含量ASSLSB的性能.
解决ASSLSB中复杂的多界面所带来的局限性.
为了提高离子导电性和接口稳定性,用于实际的电池应用.

主要方法:

使用一种含有Y2S3和LiI的双硫化物固体电解质.
采用SbSn合金作为阴极的硫宿主材料.
研究杂电解质和合金主机在接口上的协同效应.

主要成果:

双合电解质 (Y2S3和LiI) 改善了电解质-电解质和电解质-阳极接口,增强了离子导电性并抑制了树突.
这种SbSn合金硫主体在电解质-阴极接口上促进了Li+转移.
含硫量超过44%的ASSLSB在50个循环后在室温下达到1163.5mAhg-1和60°C时达到1408.7mAhg-1的高特异容量.

结论:

协同方法显著改善了ASSLSB中的固体-固体接口.
这一策略使在室温和高温下具有高硫含量的高性能ASSLSB成为可能.
这项研究为开发实用的高能量密度全固态硫电池提供了有前途的途径.

关键词:

所有固态电池都是固态电池.合金阴极是合金的阴极.硫电池是硫电池的一种.硫化物电解质的电解质是硫化物.

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