Sn‐, Sb‐ and Bi‐Based Anodes for Potassium Ion Battery

Owing to the abundant resources of potassium resources, potassium ion batteries (PIBs) hold great potential in various energy storage devices. However, the poor lifespan of PIBs anodes limit their merchant applications. The exploitation of anode materials with high performance is one of the critical factors to the development of PIBs. Metallic Sn‐, Sb‐, and Bi‐based materials, show promising future thanks to their high theoretical capacities and safe working voltage. However, the rapid capacity decay caused by the large K+ is still a pivotal challenge. In this review, recent progresses on alloying anodes were summarized. Schemes, such as ultra‐small nanoparticles, hetero‐element doping, and electrolyte optimization are effective strategies to improve their electrochemical properties. This review provides an outlook on the nanostructures and their synthesis methods for the alloying‐type materials, and will stimulate their intensive study for practical application in the near future. The limited and uneven distribution of lithium sources drive the motivation of developing potassium ion batteries as alternatives to lithium ion batteries. Sn‐, Sb‐ and Bi‐based anodes have great potential to promote the development of PIBs. This review summarizes the recent advances of Sn‐, Sb‐ and Bi‐based anodes for PIBs, hoping to lay a solid foundation for future practical applications.