P2-type Na0.67Mn0.65Fe0.2Ni0.15O2 Cathode Material with High-capacity for Sodium-ion Battery

- P2-Na0.67Mn0.65Fe0.2Ni0.15O2 as Na storage cathode can deliver a high reversible capacity of 208 mAh g−1.
- The P2-Na0.67Mn0.65Fe0.2Ni0.15O2 electrode exhibits a improved cycling stability.
- The improved electrochemical performance is due to the Ni substitution.