Author(s): Liu, CX (Liu, Chunxue); Li, R (Li, Rui); Liu, WJ (Liu, Weijia); Shen, GZ (Shen, Guozhen); Chen, D (Chen, Di)

Source: ACS APPLIED MATERIALS & INTERFACES Volume: 13 Issue: 31 Pages: 37194-37200 DOI: 10.1021/acsami.1c09951 Published: AUG 11 2021

Abstract: Vanadium oxide-based aqueous zinc-ion batteries exhibit promising potential due to their low cost and safety profiles. However, fabricating cathodes with outstanding electrochemical performance for Zn-ion batteries is still a challenge. Herein, network C@V2O5 materials were prepared using a mild chitosan-assisted hydrothermal process. Coin-type cells, using network C@V2O5 as a cathode, zinc film as an anode, and Zn(CF3SO3)(2) as an electrolyte, were also assembled, and the as-synthesized cathode delivered a high specific capacity of 361 mA h g(-1) at 0.5 A g(-1) and excellent cyclic stability. Specifically, after 2000 cycles, the capacity still remained about 71% of the initial value at 0.5 A g(-1). Moreover, ex situ X-ray diffraction (XRD) characterizations confirmed that Zn-ion storage in the cathode was achieved through the reversible intercalation/extraction of Zn2+ during the charge/discharge process. Therefore, the network C@V2O5 cathode demonstrated potential applications for zinc-ion batteries.

Accession Number: WOS:000685245800051

PubMed ID: 34314171

ISSN: 1944-8244

eISSN: 1944-8252

Full Text: https://pubs.acs.org/doi/10.1021/acsami.1c09951