Architectures of Positive Electrodes for Rapid Charging/Discharging Performances of Lithium Ion Secondary Batteries

抄録

Research on architectures of positive electrodes for rapid charging/discharging performances of lithium ion secondary batteries have been carried out by analyzing the contact resistance in the electrode composite. For the high charging/discharging rate, it was found that the decrease in the contact resistance between aluminum current collector and the active material composite was a key issue. The increase in the amount of point defect in the passivation film on aluminum and the increase in the contacting points at the terminal end of the carbon conductive additive network to the passivation film are effective for this purpose. The simple equation that determines the maximum amount of active material in the electrode composite was derived. By applying this equation, we concluded that LiMn₂O₄ active material had the maximum high charging/discharging rate of 720 C at least.