Advancements and Perspectives on Nonaqueous Electrolyte Engineering for Graphite Anode in Potassium‐Ion Battery

Abstract Potassium‐ion batteries (KIBs) have emerged as a promising alternative to lithium‐ion batteries due to the abundance and low cost of potassium resources. Coupled with commercial graphite anode, KIBs have great potential for the next‐generation large‐scale electrochemical energy storage devices. However, graphite anode in KIBs suffers from rapid capacity decay in commercial “potassium hexafluorophosphate (KPF 6 ) + ethylene carbonate (EC)” electrolytes. These issues can be addressed through electrolyte engineering, which has been proven effective in improving graphite performance. This review explores the underlying mechanisms of K + storage in graphite, the challenges of electrolyte design, and the recent advancements in electrolyte engineering for graphite anode optimization in KIBs.