储能科学与技术2024，Vol.13Issue(7)：2308-2316,9.DOI:10.19799/j.cnki.2095-4239.2024.0426
钾离子电池低温电解质的研究进展
Advances in low-temperature electrolytes for potassium-ion batteries
摘要
Abstract
Potassium-ion batteries(PIBs)have emerged as a potential energy storage device due to their high energy density and low cost.In particular,the smaller Stokes radius of K+enables ultra-low temperature potassium-ion batteries.However,conventional electrolytes can cause PIBs to grow dendrites at low temperatures,leading to battery failure and safety hazards.Therefore,improving the low-temperature properties of the electrolyte is crucial to improving the low-temperature performance of PIBs.This study reviews the progress made in recent years related to low-temperature electrolytes for PIBs,which can be roughly divided into three categories,namely non-aqueous electrolytes,aqueous electrolytes,and solid electrolytes.Non-aqueous electrolytes mostly contain weakly solvating ether solvents and additives,which enhance the interfacial desolvation process and form a good solid electrolyte interface film on the electrode surface to improve the low-temperature performance of PIBs.The aqueous electrolyte helps PIBs to achieve good low-temperature performance by introducing specific additive molecules to lower the electrolyte freezing point and destroy the network of hydrogen bonds between the H2O molecules.The quasi-solid-state electrolyte,which retains a small amount of liquid electrolyte in the channels of the polymer skeleton,improves the electrolyte bulk ion transport and reduces the contact resistance between the electrolyte and the electrode interface,which ultimately improves the low-temperature performance of PIBs.关键词
钾离子电池/低温性能/非水系电解液/水系电解液/固态电解质Key words
potassium ion battery/low-temperature performance/non-aqueous electrolyte/aqueous electrolyte/solid-state electrolyte分类
信息技术与安全科学引用本文复制引用
赵飞,陈英华,马征,李茜,明军..钾离子电池低温电解质的研究进展[J].储能科学与技术,2024,13(7):2308-2316,9.基金项目
国家自然科学基金委员会青年科学基金项目(22109155),国家自然科学基金委员会优秀青年科学基金项目(22122904),吉林省自然科学基金项目(YDZJ202101ZYTS022,20230101028JC). （22109155）
