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In article number 1801989, Yu Chen, Chenglin Yan, and co‐workers report an envelope‐like N‐doped carbon nanosheet for ultra‐stable K‐ion storage. The cover shows the combination of K+ insertion and pseudocapacitive behavior of the resulting carbonaceous anode, exhibiting outstanding long‐term cyclability and fast charge‐discharge storage.
Carbon‐based materials are considered to be one of the most promising materials for negative electrodes of the future, because of their good chemical stability, high electrical conductivity, and environmental benignity. However, to date, the underlying principles of K‐ion storage in carbonaceous anodes remain elusive, which greatly hinders the development of such a category of anodes. Herein, the...
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