A zero-strain Na-deficient NASICON-type Na2.8Mn0.4V1.0Ti0.6(PO4)3 cathode for wide-temperature rechargeable Na-ion batteries

Xing Shen; Yuefeng Su; Shunli He; Yali Li; Lifeng Xu; Ni Yang; Yanshun Liao; Meng Wang; Feng Wu

doi:10.1039/D3TA03555G

A zero-strain Na-deficient NASICON-type Na_2.8Mn_0.4V_1.0Ti_0.6(PO₄)₃ cathode for wide-temperature rechargeable Na-ion batteries†

Xing Shen,

^ab Yuefeng Su,*^ab Shunli He,^b Yali Li,^b Lifeng Xu,^ab Ni Yang,^b Yanshun Liao,^ab Meng Wang^b and Feng Wu*^ab

Author affiliations

* Corresponding authors

^a School of Materials Science and Engineering, Beijing Key Laboratory of Environmental Science and Engineering, Beijing Institute of Technology, Beijing 100081, China
E-mail: suyuefeng@bit.edu.cn, wufeng863@bit.edu.cn

^b Beijing Institute of Technology, Chongqing Innovation Center, Chongqing, China

Abstract

Na superionic conductor (NASICON) type cathode materials with high structural stability and fast Na⁺ diffusion have been considered as high-power candidates for the exploration of Na-ion batteries. However, the substitution of active elements with low cost and additional attributes remains epoch-making due to the structural flexibility and insufficient utilization of the introduced components. Herein, the Na-deficient strategy based on charge balance is employed to take full advantage of the Na⁺ ions and active transition metals within the voltage window of 2.0–4.2 V. The optimized Na_2.8Mn_0.4V_1.0Ti_0.6(PO₄)₃ cathode realizes a 2.1 e⁻ redox reaction with a 76% utilization rate of Na⁺ ions rooted in the lattice, allowing a discharge capacity of 126.2 mA h g⁻¹ and superior capacity retention of 88.1% at 20 C over 3000 cycles. Consequently, the developed cathode also achieved superior reaction reversibility and remarkable Na-storage properties, even under extreme working conditions and with full cell configurations. This work could provide new perspectives and an efficient regulation protocol for high-performance Na-ion batteries.

This article is part of the themed collection: #MyFirstJMCA

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Article information

DOI: https://doi.org/10.1039/D3TA03555G
Article type: Paper
Submitted: 16 Jun 2023
Accepted: 14 Jul 2023
First published: 15 Jul 2023

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J. Mater. Chem. A, 2023,11, 16860-16870

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A zero-strain Na-deficient NASICON-type Na_2.8Mn_0.4V_1.0Ti_0.6(PO₄)₃ cathode for wide-temperature rechargeable Na-ion batteries

X. Shen, Y. Su, S. He, Y. Li, L. Xu, N. Yang, Y. Liao, M. Wang and F. Wu, J. Mater. Chem. A, 2023, 11, 16860 DOI: 10.1039/D3TA03555G

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Journal of Materials Chemistry A