Effect of carbon coating on low temperature electrochemical performance of LiFePO4/C by using polystyrene sphere as carbon source

► Performance of LiFePO4/C under −20 °C using polystyrene as carbon source is studied. ► LFP-3.0 wt% C exhibits excellent electrochemical capability. ► After 100 cycles, there is almost 100% capacity retained for LFP-3.0 wt% C. ► LiFePO4 particles are completely coated by carbon.