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The Rise of Prussian Blue Analogs: Challenges and Opportunities for High‐Performance Cathode Materials in Potassium‐Ion Batteries
Author(s) -
Zhao Shuoqing,
Guo Ziqi,
Yan Kang,
Guo Xin,
Wan Shuwei,
He Fengrong,
Sun Bing,
Wang Guoxiu
Publication year - 2021
Publication title -
small structures
Language(s) - English
Resource type - Journals
ISSN - 2688-4062
DOI - 10.1002/sstr.202000054
Subject(s) - prussian blue , cathode , battery (electricity) , materials science , potassium ion battery , intercalation (chemistry) , nanotechnology , electrochemistry , lithium (medication) , inorganic chemistry , chemistry , electrode , electrical engineering , lithium vanadium phosphate battery , power (physics) , engineering , medicine , physics , quantum mechanics , endocrinology
Potassium‐ion batteries (PIBs) are emerging as one of the potential alternatives to lithium‐ion batteries for next‐generation rechargeable battery systems. Nevertheless, the lack of suitable cathode materials with high capacity hinders their practical applications. Recently, Prussian blue analogs (PBAs) cathode materials stand out as promising candidates for PIBs. Their unique crystal structure with open 3D frameworks and large interstitial voids favors fast K + intercalation without causing drastic volume expansion, which is the prerequisite for high‐rate and long‐term battery operation. Herein, a fundamental review on the development and advance of PBAs cathode materials is presented for PIBs with in‐depth elucidation of their crystal structures, chemical compositions, and electrochemical performances. Particularly, the unique and prominent advantages of PBAs in both aqueous and nonaqueous PIBs are highlighted. In addition, to bridge the current gap from the laboratory to future commercialization, potential improvement strategies are proposed to overcome the present drawbacks. Finally, perspectives and new insights are provided for further exploration and research in PBAs for better PIBs.