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Mo₃S₁₃ Chalcogel:用于基于转换的离子电池的高容量电极

Taohedul Islam¹, Subrata Chandra Roy¹, Sahar Bayat²

¹Department of Chemistry, Physics, and Atmospheric Sciences, Jackson State University, 39217, Jackson, MS, USA.

|March 23, 2024

概括

研究人员开发了一种新型的富含硫的硫化 (Mo3S13) 凝,用于硫化电池 (LiSB). 这种材料表现出高容量和持续的性能,克服了传统金属硫化物电极的局限性.

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:

金属硫化物电极在理论上具有高的能量密度,但在储能系统中面临实际限制.
开发稳定和高性能电极材料对于推进电池技术至关重要.

研究的目的:

合成和鉴定一种富含硫的Mo3S13石化凝,用于硫化电池 (LiSB) 中的转换电极.
为了研究Mo3S13凝的局部结构和电化学性能.
为了证明这种材料在可持续和高容量储能方面的潜力.

主要方法:

可溶液处理的,室温 (RT) 合成的Mo3S13凝.
操作拉曼光谱,同步射线X射线对分布函数 (PDF),X射线吸收近边缘结构 (XANES) 和扩展的X射线吸收细结构 (EXAFS) 分析.
一开始的分子动力学 (AIMD) 模拟.
对Li/Mo3S13半电池进行电化学测试.

主要成果:

无形的Mo3S13 chalcogel 呈现出一个 3D 网络结构,其中有连接 Mo3S13 单元的 S-S 键.
最初的放电容量达到了1013 mAh g-1.
312 mAh g-1的稳定容量在140个循环后保持在C/3速率.
高容量和稳定性归因于丰富的 (多) 硫化物键和稳定的Mo-S协调.

结论:

Mo3S13石墨凝是一种有前途的基于转换的电极材料,用于LiSBs.
独特的结构和组成有助于其卓越的电化学性能.
这项工作突显了 chalcogels 在下一代能源存储解决方案中的潜力.

关键词:

在Mo3S13中使用的石墨.气凝是一种气凝.基于转换的电池.硫化物电池的硫化物电池.

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