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Silver vanadium bronze, beta-Ag0.33V2O5: crystal-water-free high-capacity cathode material for rechargeable Ca-ion batteries

Title
Silver vanadium bronze, beta-Ag0.33V2O5: crystal-water-free high-capacity cathode material for rechargeable Ca-ion batteries
Authors
Hyoung, JooeunHeo, Jongwook W.Jeon, BoosikHong, Seung-Tae
DGIST Authors
Hyoung, Jooeun; Heo, Jongwook W.; Jeon, Boosik; Hong, Seung-Tae
Issue Date
2021-08
Citation
Journal of Materials Chemistry A, 9(36), 20776-20782
Type
Article
Keywords
MAGNESIUMCALCIUMINTERCALATIONPERFORMANCEELECTRODE
ISSN
2050-7488
Abstract
Calcium-ion batteries (CIBs) are getting increasing attention as post-lithium-ion batteries owing to their theoretical and potential advantages in terms of energy density and cost-effectiveness. However, most of the reported cathode materials suffer from low capacity or cyclability in dried nonaqueous electrolytes. So far, all of the materials with high capacity (>100 mA h g−1) contain crystal water, which was considered to be crucial to the structural stability, enabling facile Ca diffusion. Here, we report β-Ag0.33V2O5as a high-capacity cathode material for CIBs without crystal water. After the initial activation process, the material exhibited a capacity of 179 mA h g−1at approximately 2.8 V (vs.Ca2+/Ca) in the ninth cycle and showed a modest cycling performance. The capacity is the highest among the Ca cathode materials without crystal water reported to date. We revealed that the activation process was caused by a replacement reaction between the silver and calcium ions. This material demonstrates that crystal water is not an essential component of CIB electrode materials for a high capacity, stimulating the ongoing research for developing higher-performance materials. © The Royal Society of Chemistry 2021.
URI
http://hdl.handle.net/20.500.11750/15533
DOI
10.1039/d1ta03881h
Publisher
Royal Society of Chemistry
Related Researcher
  • Author Hong, Seung-Tae Battery Materials Discovery Laboratory
  • Research Interests Magnesium, calcium, and zinc ion batteries; lithium all-solid-state batteries; Inorganic materials discovery; Solid state chemistry; Crystallography; Mg, Ca, Zn 이온 이차전지; 리튬 전고체전지; 신 무기재료 합성; 고체화학; 결정화학
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Collection:
Department of Energy Science and EngineeringBattery Materials Discovery Laboratory1. Journal Articles


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