Role of Ether‐Based Electrolytes in Enhancing Potential of Potassium‐ion Batteries

Abstract Potassium‐ion batteries are a promising advancement in secondary batteries, offering the potential to surpass even sodium‐ion batteries in replacing lithium‐ion batteries. Although the technology has the potential for high energy density, unresolved technical difficulties pose a challenge. Fortunately, progress is made in improving electrode materials, with studies demonstrating that controlling the fundamental cause of electrolyte degradation can significantly enhance the performance of potassium‐ion batteries. However, the ability of ether‐based electrolytes to improve battery performance is overlooked despite their inherent characteristics. This work explores the role and principles of ether‐based electrolytes in enhancing the potential of potassium‐ion batteries, highlighting various controversies and prospects in this area arising from insufficient research.