Electrochemical Intercalation of Potassium into Graphite
Jin ZhaoSchool of Material Science Tianjin University Tianjin 300072 ChinaXiaoxi ZouSchool of Materials Science and Engineering Wuhan Institute of Technology Wuhan 430073 ChinaYujie ZhuSchool of Chemistry and Environment Beihang University Beijing 100191 ChinaYunhua XuCollaborative Innovation Center of Chemical Science and Engineering (Tianjin) Tianjin 300072 ChinaChunsheng WangDepartment of Chemical and Biomolecular Engineering University of Maryland College Park MD 20742 USA
2016en
ABI
Abstract
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.
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