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在Na₃SbS₄电解质中通过固态合成强化素兴奋剂机制和接口

Liangliang Yu^1,2, Jingxuan Yin^1,2, Chengwei Gao¹

¹Laboratory of Infrared Material and Devices, Advanced Technology Research Institute, Ningbo University, Ningbo 315211, China.

ACS applied materials & interfaces

|June 22, 2023

概括

素兴奋剂增强所有固态离子电池的固体电解质 (SSEs). 用添加的Na3SbS4在100小时内表现出稳定的循环,在环境温度下提高了电池性能.

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
固态化学固态化学

背景情况:

所有固态离子电池都需要高性能固体电解质 (SSEs) 来在环境温度下工作.
硫化物固体电解质Na3SbS4 (NBS) 提供良好的化学稳定性和低成本合成,但通过液相方法制备时具有有限的导电性.

研究的目的:

通过引入素兴奋剂来提高Na3SbS4的离子导电性和电池性能.
研究用,和对NBS进行兴奋剂的结构和电化学效应.

主要方法:

通过固态方法合成化Na3-xSbS4-x (M = Cl, Br, I; 0 ≤ x ≤ 0.3).
使用X射线衍射与精细化分析和拉曼光谱学进行表征.
在室温下测试具有Na2.85SbS3.85Br0.15和原始Na3SbS4的对称电池.

主要成果:

事实证明,素兴奋剂,特别是,可以增强Na3SbS4.4的离子导电性.
使用Na2.85SbS3.85Br0.15的对称电池在0.1 mA/cm2.15下表现出稳定的循环运行超过100小时.
结构分析揭示了素结合对晶体结构和Na+离子运输通路的影响.

结论:

固态合成和素兴奋剂是开发先进SSE的有效策略.
用添加的Na3SbS4为稳定高效的全固态离子电池提供了有前途的材料.
这项工作通过优化NBS中的素兴奋剂,为制造新型SSE提供了一条途径.

关键词:

晶体结构是一种晶体结构.电化学稳定性电化学稳定性素兴奋剂的使用素兴奋剂高导电性的高导电性.硫化物是固体电解质的电解质.

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