The degradation characteristics and mechanism of Li[Ni0.5Co0.2Mn0.3]O2 batteries with high frequency current ripple excitation

•Set up DC experiments at different temperatures to compare the effect of high frequency ripple and temperature on degradation of battery life.•Analyzed the effect of high frequency ripple current on the battery power performance and capacity of each part.•Revealed the mechanism of high-frequency ripple current effect on lithium-ion battery life.