Polyoxometalates (POMs) with Ion/Electron‐Sponge Properties and Abundant Active Sites as Emerging Electrode Materials for Secondary Batteries: A Review

Abstract Faced with the increasingly severe energy and environment issues, eco‐friendly and efficient energy storage/transformation technology has become a research hotspot. Due to the ion/electron‐sponge properties and superior catalytic performance, polyoxometalates (POMs) have broad prospects in improving the performance of electrodes and batteries. In this paper, the structural characteristics and physical/chemical properties of POMs are introduced, and the recent research progresses of POM‐electrodes for various battery systems are reviewed. By analyzing the relationship between the composition, structure and electrochemical performance of POMs, the advantages and challenges of applying POMs as electrode materials are explained, and the practical modification strategies for improving the performance of POM‐electrode are proposed, aiming to provide reference for the further investigation and application of POMs in energy storage field.