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Wanjie Gao¹, Laisuo Su², Yueheng Yu¹

¹Confucius Energy Storage Lab, School of Energy and Environment, Southeast University, 211189, Nanjing, Jiangsu, China.

Angewandte Chemie (International ed. in English)

|August 29, 2024

概括

新型硫酸盐接口通过防止树脂和聚硫化物穿来增强室温硫 (RT Na-S) 电池. 这一突破使得高容量,无阳极的RT Na-S电池具有更好的稳定性和性能.

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:

室温硫 (RT Na-S) 电池面临的挑战是不均的沉积和多硫化物 (NaPSs) 穿,限制了实际应用.
开发稳定的接口对于克服这些局限性和提高电池性能至关重要.

研究的目的:

为RT Na-S电池的阴极和阳极设计新的硫酸盐 (Na2TeS3) 接口.
为了同时解决树突生长和聚硫化物穿问题.

主要方法:

通过碳热反应制造异构性阴极 (Na2S/Na2Te@C),以形成现场Na2TeS3接口.
在阳极上形成Na2TeS3固体电解质间相 (SEI) 的电化学过程.

主要成果:

Na2TeS3阴极接口改善了电子/离子扩散和催化活性,减少了聚硫化物穿,提高了活性材料的利用率.
阳极上的Na2TeS3 SEI层促进了离子运输和稳定了沉积,使得无树的涂层/脱落成为可能.
一个没有阳极的电池与修改的阴极实现了超高的初始放电容量634mAhg-1在0.1C.

结论:

开发的Na2TeS3接口有效地缓解了RT Na-S电池中的关键问题.
这一战略为设计高性能,无阳极的RT Na-S电池提供了一个有希望的新方向.

关键词:

缓解的穿效应缓解的穿效应没有树突的阳极是没有树突的.在室温的硫电池.硫酸盐的接口接口

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