Improving the cycling stability and rate performance of an aqueous sodium-ion supercapattery via mitigating metal dissolution and boosting conductivity by anchoring FePBA on rGO

Integration of FePBA with rGO boosts conductivity and suppresses Fe ion dissolution, enabling the FePBA/rGO composite to achieve 435 C g −1 capacity, 91% retention over 10 k cycles, and an excellent energy-power balance: 62.32 Wh kg −1 at 9 kW kg −1 .