Study on the different effects of aluminum doping on Fe-Mn and Ni-Mn based compounds as cathode material for sodium-ion batteries

• Published in: Journal of industrial and engineering chemistry (Seoul, Korea) Vol. 124; pp. 287 - 293
• Main Authors: Qiao, Danlei, Zhang, Yixuan, Su, Chang, Liu, Guoqiang, Wang, Qingxiang, Wen, Lei
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 25.08.2023; 한국공업화학회
• Subjects: Al-substitution; Electrochemical properties; Fe-Mn based oxide; Ni-Mn based oxide; P2-type cathode; Sodium ion batteries; 화학공학; Fe-Mn based oxide; P2-type cathode; Al-substitution; Electrochemical properties; Sodium ion batteries; Ni-Mn based oxide
• ISSN: 1226-086X; 1876-794X
• DOI: 10.1016/j.jiec.2023.04.019

Al-doped Fe-Mn and Ni-Mn based materials with P2-type layered structure has been synthesized and tested as a positive electrode material for rechargeable sodium batteries. The modification mechanisms of Al doping in Fe-Mn and Ni-Mn based materials have been discussed. The synthesized Al-doped Ni-Mn based material Na0.67Mn0.8Ni0.16Al0.04O2 delivers a reversible capacity of 135.1 mAh g−1, which corresponds to 92.1% of the initial capacity with excellent cyclability for 200 cycles. What’s more, it can still remain a capacity of 96.2 mAh g−1 at a current density of 2000 mA g−1. When the voltage range increase to 1.5 – 4.3 V, its initial discharge capacity can reach 190.3 mAh g−1.