Publication Type : Journal Article
Publisher : Elsevier BV
Source : Materials Letters
Url : https://doi.org/10.1016/j.matlet.2023.135397
Keywords : Na-ion batteries, Cathode, Capacity, Cationic potential, Dual doping
Campus : Kochi
School : Center for Nanosciences
Department : Nanosciences and Molecular Medicine
Year : 2024
Abstract : P2-Na x TMO2, (x ≤0.67, TM-transition metal) oxides are promising cathode materials for Na-ion batteries, however they suffer from Na+-vacancy ordering and huge structural transformations ( P 2 → O 2 → O P 4 ). In contrast, high Na content in P2-type cathodes enables high structural stability and promotes active elements to their lower oxidation state and thereby achieving high capacity and cycling stability. Herein, light-weight elements boron and lithium doped in P2-type Na0.67Ni0.33Mn0.67O2 using cationic potential approach, aiming to improve the Na content. Li-B doped Na0.8Ni0.3Mn0.6Li0.05B0.05O2 delivers a capacity of 85 mAh/g and excellent capacity retention (88 % after 500 cycles). The effects of Li-B doping in P2-type Na0.67Ni0.33Mn0.67O2 are systematically investigated.
Cite this Research Publication : Neeraja Nair, Shantikumar V. Nair, Senthilkumar Baskar, High Na-content P2 and P2-O3 layered oxide cathodes for high performance Na-ion batteries, Materials Letters, Elsevier BV, 2024, https://doi.org/10.1016/j.matlet.2023.135397