Recent advances in anode materials for potassium-ion batteries: A review

Potassium-ion batteries (PIBs) are appealing alternatives to conventional lithium-ion batteries (LIBs) because of their wide potential window, fast ionic conductivity in the electrolyte, and reduced cost. However, PIBs suffer from sluggish K+ reaction kinetics in electrode materials, large volume expansion of electroactive materials, and the unstable solid electrolyte interphase. Various strategies, especially in terms of electrode design, have been proposed to address these issues. In this review, the recent progress on advanced anode materials of PIBs is systematically discussed, ranging from the design principles, and nanoscale fabrication and engineering to the structure-performance relationship. Finally, the remaining limitations, potential solutions, and possible research directions for the development of PIBs towards practical applications are presented. This review will provide new insights into the lab development and real-world applications of PIBs.

Automated summary

Potassium-ion batteries (PIBs) have emerged as appealing alternatives to conventional lithium-ion batteries (LIBs) due to their wide potential window, fast ionic conductivity, and reduced cost. Despite facing challenges such as slow reaction kinetics and large volume expansion, various strategies, especially in electrode design, have been proposed to address these issues. Recent progress on advanced anode materials of PIBs has been systematically discussed, highlighting the design principles and structure-performance relationship to pave the way for practical applications.