Aging mechanisms analysis of Graphite/LiNi_0.80Co_0.15Al_0.05O₂ lithium-ion batteries among the whole life cycle at different temperatures

Lithium-ion batteries (LIBs) are widely used in electric vehicles, while capacity fading happens due to unwanted side reactions during cycling. Therefore, it is of great significance study the aging mechanisms LIBs among whole life cycle for use and design LIBs. In this study, experiments Graphite/LiNi 0.80 Co 0.15 Al 0.05 O 2 (NCA) were conducted at 25°C 45°C, examined by differential voltage analysis method electrochemical impedance spectroscopy method, verified microscopic morphology observation. The results show that loss anode active material lithium ions main degradation modes, plating reaction late stage inducement plunge both 45°C. But causes different, 25 °C, growth solid electrolyte interphase (SEI) leads plating, 45 accumulation gas plating.