Failure analysis of lithium ion battery electrolytes and advances in their advanced testing and characterization techniques
Electrolyte is a key factor to ensure the excellent performance of lithium ion batteries,such as long-term cycle stability and high capacity retention.However,the electrolyte is affected by a vari-ety of factors,such as impurity residues,temperature fluctuations,voltage window mismatch,etc.,which can lead to Li-ion battery failure and even fire and explosion,and the specific forms of failure are gas production,thermal runaway,aging,liquid leakage,and capacity degradation,etc.These fail-ures seriously affect the performance,stability and safety of lithium ion battery.This study compre-hensively summarizes the advanced testing and characterisation techniques adopted for electrolyte failure,and selects a number of typical cases for in-depth analysis,and analyses the causes and phe-nomena of failure.On this basis,the importance of developing and utilizing in-situ and in-line testing and analysis techniques is emphasized in the paper.Finally,the research prospect of electrolyte fail-ure analysis is envisioned,and the development direction of multilevel failure analysis,simulation and early warning technology is proposed,with a view to providing reference for further research on failure analysis technology and improving battery performance.
lithium ion batteryelectrolytefailure analysisadvanced testingin-situ testing
万方数据
维普
