Abstract
The research to discover a suitable cathode material for calcium-ion batteries (CIBs) remains challenging, despite their potential advantages of high energy density and cost-effectiveness. Herein, we report K0.5V2O5 as a cathode material for CIBs. During the initial charging of the electrode, potassium ions were replaced with 0.12 Ca. The calcium-exchanged electrode exhibited a reversible discharge capacity of â 100 mAh g-1 at 0.1 C rate at room temperature with an average voltage of â 3.0 V (vs Ca/Ca2+). The reversible capacity is higher than any reported cathode materials without crystal water, demonstrating the feasibility of further development of high-capacity crystal-water-free CIB cathode materials.
Original language | English |
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Pages (from-to) | 7487-7491 |
Number of pages | 5 |
Journal | ACS Applied Energy Materials |
Volume | 4 |
Issue number | 8 |
DOIs | |
State | Published - 23 Aug 2021 |
Bibliographical note
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Keywords
- calcium vanadium bronze
- calcium-ion batteries
- cathode material
- intercalation
- potassium vanadium bronze