Double-Sheet Vanadium Oxide as a Cathode Material for Calcium-Ion Batteries

Munseok S. Chae, Jongwook W. Heo, Jooeun Hyoung, Seung Tae Hong

Research output: Contribution to journalArticlepeer-review

45 Scopus citations

Abstract

Calcium-ion batteries (CIBs) are theoretically considered one of the potential post-lithium-ion battery technologies. However, only a few host materials are known to intercalate Ca ions. Herein, we demonstrate the use of double-sheet vanadium oxide V2O5 ⋅ 0.63H2O as a high-performance cathode material for CIBs. The vanadium oxide was synthesized via an electrochemical oxidation process on a graphite foil substrate. The material exhibited a high reversible capacity of 204 mAh g−1 at a 0.1 C rate in an aqueous electrolyte, with an average discharge voltage of 2.76 V vs. Ca/Ca2+, and a capacity retention of 86% after 350 cycles. The reaction mechanism can be described as a combination of diffusion-controlled intercalation and surface-limited pseudo-capacitance reactions. This study provides a new type of Ca host material, motivating further development of new CIB cathode materials.

Original languageEnglish
Pages (from-to)1049-1053
Number of pages5
JournalChemNanoMat
Volume6
Issue number7
DOIs
StatePublished - 1 Jul 2020
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2020 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim

Funding

This work was supported by the Samsung Research Funding & Incubation Center of Samsung Electronics under Project Number SRFC‐MA1601‐04.

FundersFunder number
SamsungSRFC‐MA1601‐04

    Keywords

    • bi-layered vanadium oxide
    • calcium intercalation
    • calcium-ion battery
    • double-sheet vanadium oxide
    • multivalent-ion battery

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