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
02 ربيع الأول 1445
Accepted
12 ربيع الثاني 1445
First published
12 ربيع الثاني 1445

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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