Journal
SMALL STRUCTURES
Volume 2, Issue 1, Pages -Publisher
WILEY
DOI: 10.1002/sstr.202000054
Keywords
cathode materials; electrochemistry; improvement strategies; potassium-ion batteries; Prussian blue analogs
Funding
- Australian Rail Manufacturing Cooperative Research Centre (RMCRC) through the RMCRC 1.1.1 project
- Australian Research Council (ARC) through ARC Discovery Early Career Researcher Award [DE180100036]
- ARC Discovery Project [DP170100436, DP180102297, DP200101249]
- ARC Research Hub for Integrated Energy Storage Solutions [IH180100020]
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PBAs as potential cathode materials for PIBs have unique crystal structure and advantages, enabling fast charge-discharge without causing volume expansion, and performing well in both aqueous and non-aqueous PIBs.
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.
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