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理性工程黄 In₂S₃@void@碳混合作为高性能硫电池的多硫化吸收硫宿主

Yingyi Ding¹, Zihan Shen², Tianli Han¹

¹Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Provincial Engineering Laboratory of New-Energy Vehicle Battery Energy-Storage Materials, Anhui Key Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241002, PR China. jyliu@ahnu.edu.cn.

Dalton transactions (Cambridge, England : 2003)

|July 21, 2023

概括

研究人员开发了一种新的蛋黄In2S3@void@carbon混合材料,通过解决聚硫化物穿问题来改进硫 (Li-S) 电池. 这种先进的阴极设计增强了电化学性能和循环稳定性,用于下一代储能.

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
纳米技术纳米技术

背景情况:

缓慢的氧化还原动力学和聚硫化物运输阻碍了硫 (Li-S) 电池的开发.
需要有效的策略来稳定中间体并提高电化学性能.

研究的目的:

为增强的Li-S电池设计一个黄皮的In2S3@void@carbon混合材料.
研究In2S3/电解质接口在吸附和激活多硫化物中的作用.
为了评估新型阴极的循环稳定性和速率能力.

主要方法:

蛋黄的多层组装方法 In2S3@void@碳合成.
密度函数理论 (DFT) 计算用于研究In2S3/电解质接口.
电化学测试用于评估电池性能,包括循环和速率能力.

主要成果:

In2S3@void@carbon混合动力有效地容纳硫,并减轻聚硫化物转运.
DFT计算证实了In2S3/电解质接口的强烈吸附和激活聚硫化物.
混合阴极表现出极好的可逆性和速率能力,在0.5°C的500个循环后保持563.6mAhg-1.

结论:

黄的In2S3@void@carbon结构是高性能Li-S电池的有希望的阴极材料.
该材料的设计有效地解决了Li-S电化学中的关键挑战.
这项工作为开发先进的储能系统铺平了道路.

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