A multi-functional binder for high loading sulfur cathode

• 作者: Ying Chu Ning Chen Ximing Cui Anmin Liu Liang Zhen Qinmin Pan
• 来源期刊: 能源化学
• 年，卷（期）: 2020,（7）
• 页码范围: 99-104
• 页数: 6页
• 语种: 英文

摘要

Lithium sulfur (Li-S) batteries are the promising power sources, but their commercialization is signifi-cantly impeded by poor energy-storage functions at high sulfur loading. Here we report that such an issue can be effectively addressed by using a mussel-inspired binder comprised of chitosan grafted with cate-cholic moiety for sulfur cathodes. The resulting sulfur cathodes possess a high loading up to 12.2 mg cm- 2 but also exhibit one of the best electrochemical properties among their counterparts. The excellent per-formances are attributed to the strong adhesion of the binder to sulfur particles, conducting agent, cur-rent collector, and polysulfide. The versatile adhesion effectively increases the sulfur loading, depresses the shuttle effect, and alleviates mechanical pulverization during cycling processes. The present investi-gation offers a new insight into high performance sulfur cathodes through a bio-adhesion viewpoint.