Issue 3, 2023

An advanced medium-entropy substituted tunnel-type Na0.44MnO2 cathode for high-performance sodium-ion batteries

Abstract

Because of the irreversible reaction and sluggish migration rate of Na ions during the electrochemical process, the cycling stability and rate capability of tunnel-type Na0.44MnO2 are poor. In this work, it is discovered that medium-entropy substitution can significantly increase cycling stability and rate capability. The prepared cathode Na0.44Mn0.97Al0.01Ti0.01Co0.01O2 exhibits an enhanced rate capability of 80 mA h g−1 at 20C and demonstrates a high discharge capacity of 78 mA h g−1 after 2000 cycles at 10C, with a high capacity retention of approximately 80%. The mechanism of the improved electrochemical performance of Na0.44MnO2 by the medium-entropy substitution strategy is deeply studied. The medium-entropy substitution increases the spacing of lattice fringes and replaces manganese, resulting in improved rate capability and cycling performance of Na0.44MnO2. The discovered medium-entropy Na0.44MnO2 material provides new insight into the development of tunnel-type electrode materials and promotes their application in rechargeable Na-ion batteries.

Graphical abstract: An advanced medium-entropy substituted tunnel-type Na0.44MnO2 cathode for high-performance sodium-ion batteries

Supplementary files

Article information

Article type
Research Article
Submitted
20 Jul 2022
Accepted
20 Dec 2022
First published
21 Dec 2022

Inorg. Chem. Front., 2023,10, 841-849

An advanced medium-entropy substituted tunnel-type Na0.44MnO2 cathode for high-performance sodium-ion batteries

J. Chen, Z. Hou, L. Zhang, W. Mao, T. Zhang, X. Zhang and Y. Qian, Inorg. Chem. Front., 2023, 10, 841 DOI: 10.1039/D2QI01567F

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements