Recent advances and perspectives in aqueous potassium-ion batteries

Aqueous potassium-ion batteries (AKIBs), utilizing fast diffusion kinetics of K+ and abundant electrode resources, are an emerging technology offering high power density and low cost. Many efforts have been made by far to enhance the electrochemical performances of AKIBs, and some encouraging milestones have been achieved. To provide a deep understanding of the progress, challenges, and opportunities of the emerging AKIBs, the recent advances in both cathode and anode materials, and electrolytes of the AKIB systems are comprehensively summarized and discussed. Additionally, the research efforts on the optimization of electrode material properties, the revealing of the reaction mechanism, the design of electrolytes, and the full cell fabrication for AKIBs are highlighted. Finally, insights into opportunities and future directions for achieving high-performance AKIBs and their applications are proposed.

Automated summary

AKIBs, as an emerging technology with high power density and low cost, have made some encouraging progress in recent years. Research on cathode, anode materials, and electrolytes, as well as optimization of electrode material properties, reaction mechanisms, electrolyte design, and full cell fabrication, contribute to improving the performance of AKIBs.