钾离子电池及其最新研究进展

Potassium-Ion Battery and Its Recent Research Progress

钾元素在地壳中的储量丰富、来源广泛,且物理化学性质与锂元素相似,在离子电池领域中具有广阔的发展前景。但相比于锂离子,钾离子半径较大,在材料体相中的迁移速度较慢,并使得材料承受较大的结构应力,从而导致钾离子电池的电化学性能优势不足。因此,开发具有稳定结构、能够可逆嵌脱的正负极材料和与之相匹配的电解液,成为钾离子电池目前研究的热点话题。本文主要从钾离子电池的正极材料、负极材料以及电解液三方面来介绍钾离子电池在国内外最新研究进展,并对钾离子电池未来发展方向做出一定的展望。

Potassium which is abundant in the Earth’s crust and has similar physicochemical properties to lithium,has broad development prospects in the field of ion batteries.However,compared with lithium ion,the potassium-ion radius is relatively larger,leading to the lower migration rate of potassium ion in the material and the material is subjected to larger structural stress.This causes insufficient electrochemical performance advantages of the Potassium-ion battery.Therefore,developing cathode and anode material with stable structure and the capability for reversible reaction,and electrolyte which matches well with material has become a hot topic in the research of Potassium-ion battery.In this review,the latest research progress about cathode material,anode material and electrolyte of Potassium-ion battery at home and abroad are introduced,and we also prospect the future development tendency of Potassium-ion battery.