Electrochemical Intercalation of Potassium into Graphite

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• 作者：Jin Zhao ; Xiaoxi Zou ; Yujie Zhu ; Yunhua Xu and Chunsheng Wang
• 刊名：Advanced Functional Materials
• 出版年：2016
• 出版时间：November 22, 2016
• 年：2016
• 卷：26
• 期：44
• 页码：8103-8110
• 全文大小：480K
• ISSN：1616-3028

文摘

Exceptional cycling performance of graphite anode in K-ion batteries is demonstrated with a reversible capacity of 246 mAh g^–1 and 89% retention of the initial capacity after 200 cycles. Although the graphite anode experiences huge volume change and worse kinetics during K intercalation/deintercalation, the cycling stability delivered in K-ion batteries is comparable to that of Li-ion batteries using the same graphite anode. The combination of excellent electrochemical performance, the abundance and wide availability of K in earth's crust, and the well-developed technology of the graphite anode make the K-ion battery very attractive for offering a low cost battery chemistry for large-scale energy storage applications.