【摘 要】
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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 musse
【机 构】
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School of Chemistry and Chemical Engineering,Harbin Institute of Technology,Harbin 150001,Heilongjia
论文部分内容阅读
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.
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