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阴极工程为高性能全硫化基Li-SeS₂固态电池提供了强大的接口接触

Lei Xi¹, Fangkun Li¹, Xuanyi Zhou¹

¹Guangdong Provincial Key Laboratory of Advanced Energy Storage Materials, School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China.

|August 25, 2025

概括

二硫化物 (SeS2) 通过提高导电性来增强全固态硫电池. 对于下一代储能,SeS2复合阴极具有很高的容量和稳定性.

科学领域:

材料科学
电化学
能量储存

背景情况:

完全固态的硫电池提供高能量密度和更好的安全性,而不是基于液体的系统.
硫的绝缘性和低反应性限制了这些电池的阴极性能.
解决缓慢的动力学和低利用率对于推进电池技术至关重要.

研究的目的:

研究二硫化物 (SeS2) 作为全固态硫电池的阴极活性物质.
与纯硫相比,提高电子导电性和电化学性能.
评估SeS2复合材料在高能量密度应用中的潜力.

主要方法:

使用各种策略制造SeS2复合电极,包括用Li6PS5Cl和Ketjen Black (SeS2-BM@KB) 进行球磨.
电池电化学特性,包括循环性能和容量保留.
对高负载电池进行面积容量的评估.

主要成果:

球磨SeS2/Li6PS5Cl/Ketjen Black复合阴极表现出极好的电化学性能.
在1A g-1的300个循环后,细胞的可逆容量达到673. 5mAh g-1,保持80%.
高负载电池的面积容量高达14.43 mAh cm-2.

结论:

二硫化物 (SeS2) 是完全固态硫电池的一个有前途的阴极材料.
在SeS2复合材料的三相接口上增强的相互作用提高了性能.
开发的SeS2阴极显示出新一代高能量密度储能系统的潜力.

关键词:

完全固态电池综合战略接口接触硫化硫化物固体电解质

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