Issue 3, 2023

Construction of a LiVO3/C core–shell structure for high-rate lithium storage

Abstract

As an alternative anode material for lithium-ion batteries (LIBs), LiVO3 has shown great potential. We wished to fully reveal its potential for lithium storage. We introduced low-cost oxalic acid as a carbon source to construct a LiVO3/C core–shell structure. Employed as LIB anodes, the highly reversible specific capacity of LiVO3/C reached 776.0 mA h g−1 after 200 cycles at 0.2 A g−1. During five periods of rate testing at various current densities (0.2, 0.5, 1.0, 2.0, 5.0 A g−1), the average capacity of the LiVO3/C electrode was 365.8 mA h g−1 at 5.0 A g−1, and retained a high discharge capacity of 569.0 mA h g−1 when the current was returned to 0.2 A g−1. Impressively, the LiVO3/C anode presented an unprecedented high-rate long cycling performance of 205.0 mA h g−1 at 10.0 A g−1 after 2000 cycles. The unprecedented lithium-storage ability was attributed to the unique core–shell structure, in which all-around carbon encapsulation provided many interfaces, and enhanced the electron conductivity and structural consistency of the LiVO3/C electrode. Moreover, the adaptive reaction dynamics of the LiVO3/C electrode were documented. That is, the gradually increasing pseudocapacitance contribution and decreasing charge-transfer impedance upon cycling were the intrinsic drivers of the excellent rate performance. This work promotes further development of anode materials based on LiVO3.

Graphical abstract: Construction of a LiVO3/C core–shell structure for high-rate lithium storage

Supplementary files

Article information

Article type
Paper
Submitted
24 Oct 2022
Accepted
10 Nov 2022
First published
02 Dec 2022

New J. Chem., 2023,47, 1508-1516

Construction of a LiVO3/C core–shell structure for high-rate lithium storage

D. Yang, D. Zhang, H. Wu, C. Pei, T. Xiao, H. Ma and S. Ni, New J. Chem., 2023, 47, 1508 DOI: 10.1039/D2NJ05213J

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