期刊
CHEM
卷 5, 期 5, 页码 1194-1209出版社
CELL PRESS
DOI: 10.1016/j.chempr.2019.02.014
关键词
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资金
- National Key Research and Development Program of China [2016YFA0202603, 2016YFA0202601]
- National Natural Science Fund for Distinguished Young Scholars [51425204]
- National Natural Science Foundation of China [51832004, 51521001, 51602239]
- Programme of Introducing Talents of Discipline to Universities [B17034]
- Hubei Provincial Natural Science Foundation of China [2016CFB267]
- Yellow Crane Talent (Science & Technology) Program of Wuhan City
- International Science & Technology Cooperation Program of China [2013DFA50840]
- Fundamental Research Funds for the Central Universities [WUT: 2017III009, 2017III005]
Magnesium-ion batteries (MIBs) show great potential for large-scale energy storage because of the advantages of low cost and safety, but their application is severely hindered by the difficulty in finding desirable electrode materials. Herein, we develop a bilayer-structured vanadium oxide (Mg0.3V2O5 center dot 1.1H(2)O) with synergistic effect of Mg2+ ions and lattice water as the cathode material for MIBs. The pre-intercalated Mg2+ ions provide high electronic conductivity and excellent structural stability. The lattice water enables fast Mg2+ ions mobility because of its charge shielding effect. As a result, the Mg0.3V2O5 center dot 1.1H(2)O exhibits excellent rate performance and an unprecedented cycling life with capacity retention of 80.0% after 10,000 cycles. In addition, the Mg0.3V2O5 center dot 1.1H(2)O exhibits good electrochemical performance in full MIBs. This scalable Mg2+ host material is a promising candidate as a cathode for MIBs, and its high performance is expected to meet the requirements for large-scale storage applications.
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