Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 3, Issue 39, Pages 19850-19856Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ta04643b
Keywords
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Funding
- National Basic Research Program of China [2013CB934103, 2012CB933003]
- International Science and Technology Cooperation Program of China [2013DFA50840]
- National Science Fund for Distinguished Young Scholars [51425204]
- Natural Science Foundation of Hubei Province [2014CFA035]
- Fundamental Research Funds for the Central Universities [2014-VII-007, 2014-YB-001, 2014-YB-002]
- Students Innovation and Entrepreneurship Training Program [20141049701006]
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Structural and morphological control of the LiV3O8 material has a significant impact on its electrochemical performance. In order to obtain a favorable structure, a hierarchical LiV3O8 nanowire-in-network is designed and constructed by electrospinning through a polymer crosslinking strategy. The crosslinking effect between poly(vinyl alcohol) (PVA) and poly(ethylene oxide) (PEO) not only benefits electrospinning, but also realizes a mild multi-step degradation process during calcination. Based on temperature-dependent experiments and thermo-gravimetric (TG) analysis, the function of polymer blends and the formation mechanism of the structure are discussed in detail. As a cathode for lithium batteries, LiV3O8 exhibits a high initial capacity of 320.6 mA h g(-1) at 100 mA g(-1) and a high-rate capacity of 202.8 mA h g(-1) at 2000 mA g(-1). This remarkable performance is attributed to its unique structure, which provides a large effective contact area, low charge transfer resistance, and improved structural stability. Our work indicates that the hierarchical LiV3O8 nanowire-in-network material is a promising cathode for use in high-rate and long-life rechargeable lithium batteries.
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