期刊
CHEMICAL SCIENCE
卷 12, 期 12, 页码 4450-4454出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0sc04647g
关键词
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资金
- Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan [15H05701]
- Elemental Strategy Initiative for Catalysis and Batteries (ESICB)
- JSPS KAKENHI [19H05816, 18K19124, 18H03924]
- Grants-in-Aid for Scientific Research [18H03924, 18K19124] Funding Source: KAKEN
By controlling the water concentration, stable operation of a layered vanadyl phosphate electrode in an aqueous Li+ electrolyte can be achieved. Experimental analyses and density functional theory calculations reveal reversible (de)lithiation occurs between dehydrated phases, which only exist in an optimal water concentration.
Development of high-performance aqueous batteries is an important goal for energy sustainability owing to their environmental benignity and low fabrication costs. Although a layered vanadyl phosphate is one of the most-studied host materials for intercalation electrodes with organic electrolytes, little attention has been paid to its use in aqueous Li+ systems because of its excessive dissolution in water. Herein, by controlling the water concentration, we demonstrate the stable operation of a layered vanadyl phosphate electrode in an aqueous Li+ electrolyte. The combination of experimental analyses and density functional theory calculations reveals that reversible (de)lithiation occurs between dehydrated phases, which can only exist in an optimal water concentration.
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