Hard carbon materials with high reversible sodium storage capacities up to 430.5 mA h g−1and superior cycling stability were simply synthesized by one-step pyrolysis of shaddock peel for sodium-ion batteries.
Prevention of the degradation of sodium-based layered cathode materials is the key to developing high-performance and high-stability sodium-ion batteries.
Na6.24Fe4.88(P2O7)4 is one of the intensively investigated polyanionic compounds and has shown high rate discharge capacity, but its relatively low electronic conductivity hampers the high performance of the batteries.