Issue 7, 2021

Superior potassium and zinc storage in K-doped VO2(B) spheres

Abstract

The abundant natural resources and low cost benefits of zinc-ion batteries (ZIBs) and potassium-ion batteries (KIBs) offer a better alternative to lithium-ion batteries (LIBs). Nevertheless, the large radius of K+ and high charge density of Zn2+ lead to sluggish electrochemical kinetics and the development of appropriate electrode materials for KIBs and ZIBs is therefore very important. Herein, hierarchical K-doped brookite vanadium dioxide (K–VO2(B)) spheres prepared via a simple microwave-assisted hydrothermal approach are proposed. K–VO2(B) as an anode material for PIBs shows enhanced electrochemical performance in terms of high capacity (∼420 mA h g−1), exceptional rate capability and long-term cycling performance (500 cycles). For ZIBs, it also achieves a high capacity of 350 mA h g−1 at 500 mA g−1 and 122 mA h g−1 at an extremely high rate of 50 A g−1. The outstanding PIB and ZIB performance of the K–VO2(B) is mainly benefitted from the improved ion diffusion coefficients after K-doping and the occurrence of inherently stable (de)intercalation reactions.

Graphical abstract: Superior potassium and zinc storage in K-doped VO2(B) spheres

Supplementary files

Article information

Article type
Research Article
Submitted
29 Nov. 2020
Accepted
15 Febr. 2021
First published
18 Febr. 2021

Mater. Chem. Front., 2021,5, 3132-3138

Superior potassium and zinc storage in K-doped VO2(B) spheres

Q. Li, X. Ye, Y. Jiang, E. H. Ang, W. Liu, Y. Feng, X. Rui and Y. Yu, Mater. Chem. Front., 2021, 5, 3132 DOI: 10.1039/D0QM00990C

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