Enabling highly-efficient and stable potassium-ion storage by exposing atomic-dispersed super-coordinated antimony O2Sb1N4 sites on N-doped carbon nanosheets

A viable anode of atomic Sb with a super-coordinated O2Sb1N4 structure anchored on N-doped micropore carbon nanosheets (O–Sb–N SA@NC) is developed, demonstrating significantly enhanced performance in both half and full potassium-ion batteries.