South China University of Technology researchers have proposed a sustainable strategy to synthesize a series of FePO4 wrapped by reduced graphene oxides (FePO4@rGx (x = 0.05, 0.10 and 0.15) composites directly from waste LiFePO₄ batteries. South China University of Technology researchers have proposed a sustainable strategy to synthesize a series of FePO4 wrapped by reduced graphene oxides (FePO4@rGx (x = 0.05, 0.10 and 0.15) composites directly from waste LiFePO₄ batteries.