Gallium‐Based Liquid Metals in Rechargeable Batteries: From Properties to Applications

Abstract Gallium‐based (Ga‐based) liquid metals have attracted considerable interest due to their low melting points, enabling them to feature both liquid properties and metallic properties at room temperature. In light of this, Ga‐based liquid metals also possess excellent deformability, high electrical and thermal conductivity, superior metal affinity, and unique self‐limited surface oxide, making them popular functional materials in energy storage. This provides a possibility to construct high‐performance rechargeable batteries that are deformable, free of dendrite growth, and so on. This review primarily starts with the property of Ga‐based liquid metal, and then focuses on the potential applications in rechargeable batteries by exploiting these advantages, aiming to construct the correlation between properties and structures. The glorious applications contain interface protection, self‐healing electrode construction, thermal management, and flexible batteries. Finally, the opportunities and obstacles for the applications of liquid metal in batteries are presented.