Coral-shaped porous LiFePO4/graphene hybrids for high rate and all-climate battery applications

Abstract Tailor-designed cathode materials are essential for Li-ion batteries with both high energy density and outstanding capacity retention. Here we have designed and fabricated coral-shaped hierarchical porous LiFePO 4 /graphene hybrids for lithium-ion batteries. These novel hybrid materials exhibit excellent electrochemical performance over a wide temperature range from -40 °C to +60 °C. Even at -40 °C, the hybrid cathode can deliver a high initial capacity of 120 mAhg -1 and still maintain a discharge capacity of 80 mAhg -1 after 500 cycles with a very low capacity loss of 0.066 % per cycle. The excellent wide-temperature performance can be ascribed to the porous structure and fast ion/electronic transport kinetics of the high conductive framework.