Prussian‐blue materials: Revealing new opportunities for rechargeable batteries

Abstract The demand to increase energy density of rechargeable batteries for portable electronic devices and electric vehicles and to reduce the cost for grid‐scale energy storage necessitates the exploration of new chemistries of electrode materials for rechargeable batteries. The open framework‐structure of Prussian‐blue materials has recently been demonstrated as a promising cathode host for a variety of monovalent and multivalent cations with the tunable working voltage and discharge capacities. Recent progress toward the application of Prussian‐blue cathode materials for rechargeable batteries is reviewed, with special emphasis on charge‐storage mechanisms of different insertion species, factors influencing electrochemical performances, and possible approaches to overcome their intrinsic limitations. image