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Crystal-Water-Free Potassium Vanadium Bronze (K0.5V2O5) as a Cathode Material for Ca-Ion Batteries
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- Title
- Crystal-Water-Free Potassium Vanadium Bronze (K0.5V2O5) as a Cathode Material for Ca-Ion Batteries
- Issued Date
- 2021-08
- Citation
- Purbarani, Meladia Elok. (2021-08). Crystal-Water-Free Potassium Vanadium Bronze (K0.5V2O5) as a Cathode Material for Ca-Ion Batteries. ACS Applied Energy Materials, 4(8), 7487–7491. doi: 10.1021/acsaem.1c01158
- Type
- Article
- Author Keywords
- calcium vanadium bronze ; calcium-ion batteries ; cathode material ; intercalation ; potassium vanadium bronze
- Keywords
- Calcium ; Calcium compounds ; Cathode materials ; High energy densities ; Ion batteries ; Potassium ions ; Reversible capacity ; Vanadium bronze ; Cathodes ; Chromium compounds ; Cost effectiveness ; Crystals ; Electric discharges ; Ions ; Potassium ; Secondary batteries ; Vanadium ; Crystal waters ; Discharge capacities ; High capacity
- ISSN
- 2574-0962
- 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 ∼100 mAh g-1 at 0.1 C rate at room temperature with an average voltage of ∼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. ©
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- Publisher
- American Chemical Society
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