Issue 48, 2021

VO2(B)@carbon fiber sheet as a binder-free flexible cathode for aqueous Zn-ion batteries

Abstract

With the increase in the demand for future deformable and wearable devices, flexible aqueous zinc-ion batteries are deemed to show promise as a flexible electronic power supply. In this study, a type of a binder-less cathode material with a mass loading of 4.5 mg cm−2 is successfully synthesized by a one-pot solvothermal method. By using a VO2(B)@CFS (carbon fiber sheet) nanoflake array as the cathode material in zinc-ion batteries, the specific discharge capacity of the VO2(B)@CFS nanoparticle array reaches up to 386.2 mA h g−1 at 0.2 A g−1, with an 88.6% capacity retention after 100 cycles; the excellent electrochemical performance is mainly attributed to the rapid ion or electron transfer rendered by the CFS-supported nano-chip array structure. Moreover, the electrochemical performance of VO2(B)@CFS using the cost-effective ZnSO4 electrolyte is compared with that using the Zn(CF3SO3)2 electrolyte. In addition, two assembled 3 cm × 1 cm Zn/VO2(B)@CFS flexible batteries connected in series can power a small light-emitting diode (LED) for up to 150 h without going out, providing a suitable design for a flexible cathode in aqueous zinc-ion batteries. This excellent cathode material is an ideal material for high-power flexible water-borne zinc-ion batteries.

Graphical abstract: VO2(B)@carbon fiber sheet as a binder-free flexible cathode for aqueous Zn-ion batteries

Supplementary files

Article information

Article type
Paper
Submitted
02 sep. 2021
Accepted
12 nóv. 2021
First published
12 nóv. 2021

CrystEngComm, 2021,23, 8650-8659

VO2(B)@carbon fiber sheet as a binder-free flexible cathode for aqueous Zn-ion batteries

X. Li, L. Yang, H. Mi, H. Li, M. Zhang, A. Abliz, F. Zhao, S. Wang and H. Li, CrystEngComm, 2021, 23, 8650 DOI: 10.1039/D1CE01188J

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