Na-ion batteries are currently the focus of significant research activity due to the relative abundance of sodium and its consequent cost advantages. Thus, enormous efforts have been made to improve the electrochemical performance of SIBs through the development of novel cathode materials.

According to the previous literatures, P2-type layered cathode materials for SIBs have suffered from their low initial coulombic efficiency, which inevitably requires the pre-sodiation of carbon anode materials under full cell systems. In this regard, we focused on how to increase their initial charge capacity with sacrificial salts in the level of electrode fabrication. Thus, in the present study, we suggest new electrode fabrication process with sacrificial salts to reduce the high initial irreversible.