A new approach to LiFePO4/C synthesis: The use of complex carbon source without ball milling

► A new approach without ball milling to LiFePO4/C synthesis. ► Esterification of citric acid and sucrose fosters the mixing of raw materials. ► Complex carbon source positively affect the size and surface area of LiFePO4/C. ► The ratio of carbon sources affects morphology and performance of LiFePO4/C. ► Optimizing the morphology of LiFePO4/C via the reaction during precursor drying.