Issue 24, 2023

Depressed P3–O3′ phase transition in an O3-type layered cathode for advanced sodium-ion batteries

Abstract

O3-type layered oxides are regarded as promising cathode materials for sodium-ion batteries (SIBs). However, they commonly exhibit complex phase transitions and sluggish Na+ kinetics, thus incurring poor capacity retention and rate capability. Here, O3-Na0.993Ni0.382Mn0.428Cu0.098Sn0.049O2 is obtained with Cu2+ and Sn4+ doped into the transition metal layers. It is found that the dopants Sn and Cu can enhance the electrostatic interactions between Na and O and improve the electrical conductivity, respectively. This reinforces its structure stability upon Na+ (de)intercalation and suppresses the Na+/vacancy rearrangement and the P3 → O3′ phase transition at high voltages. It exhibits a smooth charge/discharge curve, excellent cycling performance (80.7% capacity retention after 500 cycles) and good rate capability (108.5 mA h g−1 at 1000 mA g−1). This study provides new insights into designing novel layered oxide cathode materials for SIBs.

Graphical abstract: Depressed P3–O3′ phase transition in an O3-type layered cathode for advanced sodium-ion batteries

Supplementary files

Article information

Article type
Research Article
Submitted
17 sen 2023
Accepted
27 okt 2023
First published
27 okt 2023

Inorg. Chem. Front., 2023,10, 7187-7192

Depressed P3–O3′ phase transition in an O3-type layered cathode for advanced sodium-ion batteries

Z. Liang, M. Ren, Y. Guo, T. Zhang, X. Gao, H. Ma and F. Li, Inorg. Chem. Front., 2023, 10, 7187 DOI: 10.1039/D3QI01884A

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