Design Strategies for Dendrite‐Free Potassium Metal Batteries

Potassium metal batteries (KMBs) have emerged as a promising next‐generation energy storage technology, offering superior energy density and cost‐effectiveness compared to conventional graphite‐based potassium (K)‐ion batteries. However, the practical implementation of KMBs faces significant challenges, primarily due to the high reactivity of K metal anodes and uncontrollable growth of K dendrites, which lead to poor cycling stability and serious safety concerns. In recent years, there has been substantial progress in both the fundamental understanding and experimental advancements in KMB research. Herein, recent developments in K metal anodes are highlighted and potential regulatory mechanisms and strategies to improve the cycling performance of KMBs are summarized. These strategies include the 3D confinement strategies, artificial solid–electrolyte interface design, modification of current collectors, separator design, and electrolyte engineering. Finally, the opportunities and potential future directions for the application of K metal anodes are discussed. This review aims to provide a comprehensive resource for researchers working toward the development of high‐performance KMBs for next‐generation energy storage systems.