Abstract

The source of conductive ions in the charge and discharge process of AB5 -Ni OH 2 2H-graphite LiMeO2 and 2H-graphite LiFePO4 batteries is thought to be provided by the phase transition of positive active materials so it is called phase transition theory Through the detailed study of the charge and discharge processes of AB5 -Ni OH 2 2Hgraphite Li Ni1 3Co1 3 Mn1 3 O2 and 2H-graphite LiFePO4 it is found that the source of conductive ions is the de-intercalation of H nickel-hydrogen battery and Li lithium-ion battery in positive and negative active materials and the de-intercalation theory is proposed On this basis the conductive mechanisms of these three types of batteries are clarified The directional migration and movement of conductive ions under the action of electric field