4.6 Article

A Heterostructured Sulfonated CNT/Sulfur/CNT Cathode for Promoting the Binary Conversion of Polysulfides in Lithium-Metal Batteries

期刊

BATTERIES & SUPERCAPS
卷 5, 期 2, 页码 -

出版社

WILEY-V C H VERLAG GMBH
DOI: 10.1002/batt.202100302

关键词

Binary electrocatalyst; Li-S battery; Light-weight; Multifunction

资金

  1. Applied Basic Research Program of Shanxi Province [201901D211064]
  2. National Natural Science Foundation of China [21706171, U1810204, 21978193]
  3. Key Research and Development Program of Shanxi Province [20181102005, 201803D121120, 201805D131004]

向作者/读者索取更多资源

A lightweight and multifunctional multi-walled carbon nanotube/sulfur/lithiated sulfonated CNT electrode has been designed to improve the commercialization of lithium-sulfur batteries, showing outstanding performance in sulfur species adsorption, LiPS immobilization, and electrolyte electrocatalysis.
The shuttle effect of lithium polysulfides (LiPS) and sluggish redox kinetics hinder the commercialization of lithium-sulfur (Li-s) batteries. Herein, we design a lightweight and multifunctional multi-walled carbon nanotube (CNT)/sulfur/lithiated sulfonated CNT (M/S/M-SO3Li) electrode as energy storage devices. Flexible CNT films ensure continuously electron/ion transmission and serve as LiPS shielding layer. Moreover, guided by DFT and experimental results, SO3 groups exert a vital adsorption effect toward sulfur species but not NH4+ groups. The SO3 groups can not only employ as LiPS immobilizer by Li-O bands between LiPS and SO3 but also serve as multifunctional electrocatalyst to propel LiPS conversion via generating thiosulfate and polythionate and Li2S decomposition by reducing reaction overpotential. As expected, M/S/M-SO3Li electrode exhibits prominent rate capability (723.5 mAh g(-1) at 5 C), high sulfur loading (7.09 mAh cm(-2) at 5.0 mg cm(-2) sulfur), favorable anti-self-discharge capabilities (rest for 72 h at 0.5 C with 2.17%).

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.6
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据