阴极
材料科学
电化学
插层(化学)
纳米技术
工程物理
储能
锂(药物)
电极
电气工程
无机化学
功率(物理)
化学
工程类
物理
内分泌学
物理化学
医学
量子力学
作者
Yan‐Song Xu,Sijie Guo,Xian‐Sen Tao,Yong‐Gang Sun,Jianmin Ma,Chuntai Liu,Cao A
标识
DOI:10.1002/adma.202100409
摘要
Abstract Due to the obvious advantage in potassium reserves, potassium‐ion batteries (PIBs) are now receiving increasing research attention as an alternative energy storage system for lithium‐ion batteries (LIBs). Unfortunately, the large size of K + makes it a challenging task to identify suitable electrode materials, particularly cathode ones that determine the energy density of PIBs, capable of tolerating the serious structural deformation during the continuous intercalation/deintercalation of K + . It is therefore of paramount importance that proper design principles of cathode materials be followed to ensure stable electrochemical performance if a practical application of PIBs is expected. Herein, the current knowledge on the structural engineering of cathode materials acquired during the battle against its performance degradation is summarized. The K + storage behavior of different types of cathodes is discussed in detail and the structure–performance relationship of materials sensitive to their different lattice frameworks is highlighted. The key issues facing the future development of different categories of cathode materials are also highlighted and perspectives for potential approaches and strategies to promote the further development of PIBs are provided.
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