Preparation and Electrochemical Performance of LiFePO4- based Electrode Using Three-Dimensional Porous Current Collector

Three-dimensional (3D) porous current collector was introduced to improve the high-rate performance of the cells based on lithium iron phosphate (LiFePO4). The 3D porous current collector was prepared by plating aluminium on the foam-type nickel substrate. The cells using the 3D porous current collector exhibited a superior high-rate performance as compared to the cells with conventional aluminum foil current collector. The results of EIS test indicated that the application of 3D porous current collector dramatically decreased the charge-transfer resistances for the positive electrode, owing to the large effective contact area between the active material particles and the current collector.