Boosting the fast electrochemical kinetics of Na4Fe3(PO4)2(P2O7) via a 3D graphene network as a cathode material for potassium-ion batteries

Graphene-wrapped Na 4 Fe 3 (PO 4 ) 2 (P 2 O 7 ) possesses a large surface area, fast K + diffusion rate, and high structural stability, achieving excellent electrochemical performance.