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Electrochemical Intercalation of Potassium into Graphite
Author(s) -
Zhao Jin,
Zou Xiaoxi,
Zhu Yujie,
Xu Yunhua,
Wang Chunsheng
Publication year - 2016
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201602248
Subject(s) - anode , graphite , materials science , intercalation (chemistry) , electrochemistry , potassium ion battery , battery (electricity) , chemical engineering , energy storage , ion , electrode , inorganic chemistry , composite material , lithium vanadium phosphate battery , chemistry , thermodynamics , organic chemistry , engineering , power (physics) , physics
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.