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 language | English |
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Pages (from-to) | 1049-1053 |
Number of pages | 5 |
Journal | ChemNanoMat |
Volume | 6 |
Issue number | 7 |
DOIs | |
State | Published - 1 Jul 2020 |
Externally published | Yes |
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.
Funders | Funder number |
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Samsung | SRFC‐MA1601‐04 |
Keywords
- bi-layered vanadium oxide
- calcium intercalation
- calcium-ion battery
- double-sheet vanadium oxide
- multivalent-ion battery