Issue 12, 2022

In situ crafting of a 3D N-doped carbon/defect-rich V2O5−x·nH2O nanosheet composite for high performance fibrous flexible Zn-ion batteries

Abstract

Aqueous fibrous batteries with tiny volume, light weight and stretchability have furthered wearable smart textile systems like biocompatible electronics for a more efficient use of electricity. Challenges still faced by fibrous batteries include not only the deficient actual capacity but the cyclability on the cathode side. Herein, an in situ anodic oxidation strategy is reported to prepare 3D N-doped/defect-rich V2O5−x·nH2O nanosheets (DVOH@NC) as fibrous cathodes for aqueous zinc-ion batteries (AZIBs). Benefiting from the substantially abundant reaction sites, enhanced electrical conductivity, short electron/ion diffusion path and high mass loading, the newly designed DVOH@NC fibrous electrode delivers impressive capacity (711.9 mA h cm−3 at 0.3 A cm−3) and long-term durability (95.5% capacity retention after 3000 cycles), substantially outperforming previously reported fibrous vanadium-based cathodes. First-principles density functional theory (DFT) calculations further revealed that the oxygen vacancies can weaken the electrostatic interaction between Zn2+ and the host cathode accompanying the low Zn2+ diffusion energy barrier. To highlight the potential applications, a prototype wearable fiber-shaped AZIB (FAZIB) with remarkable flexibility and extraordinary weaving capability was demonstrated. More encouragingly, the resulting FAZIB could be charged with solar cells and power a pressure sensor. Thus, our work provides a promising strategy to rationally construct high-performance flexible vanadium-based cathodes for next-generation wearable AZIBs.

Graphical abstract: In situ crafting of a 3D N-doped carbon/defect-rich V2O5−x·nH2O nanosheet composite for high performance fibrous flexible Zn-ion batteries

Supplementary files

Article information

Article type
Communication
Submitted
26 Jūl. 2022
Accepted
27 Sept. 2022
First published
29 Sept. 2022

Nanoscale Horiz., 2022,7, 1501-1512

In situ crafting of a 3D N-doped carbon/defect-rich V2O5−x·nH2O nanosheet composite for high performance fibrous flexible Zn-ion batteries

R. Pan, A. Zheng, B. He, Y. Xiong, F. Han, L. Wei, Q. Li, Q. Zhang, K. Yin and L. Sun, Nanoscale Horiz., 2022, 7, 1501 DOI: 10.1039/D2NH00349J

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