期刊
CERAMICS INTERNATIONAL
卷 48, 期 6, 页码 8325-8330出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2021.12.037
关键词
Nanofibers; Lithium energy storage; High-rate capability
资金
- Ministry of Education of China University Innovation Fund Project [2019YYA04001]
- Sub-project of Guangdong Provincial Science and Technology Planning Project (Foreign Science and Technology Cooperation Platform) [2019A050520001]
- Basic and Applied Basic Research Project of Guangzhou Science and Technology Bureau [202102080264]
- College Scientific Research Project of Guangzhou Education Bureau -Innovation Team Scientific Research Project [202032848]
- Provincial Higher Education Teaching Reform Project [2019-456]
- Guangzhou Education Science Planning Project [201911941]
- Provincial Quality Engineering Project [2019-89]
In this work, a facile method was proposed to fabricate Ti4+-doped Li3V2(PO4)3/C nanofibers, and the Ti4+ doping contributed to the improved electrical conductivity and Li+ diffusion coefficient, resulting in good battery characteristics.
In this work, we propose a facile approach to fabricate Ti4+-doped Li3V2(PO4)3/C (abbreviated as C-LVTP) nanofibers using an electrospinning route followed by a high temperature treatment. In this designed nanocomposite, the ultrafine LVTP dots are homogeneously dispersed into one-dimensional carbon nanofibers and the Ti4+ doping does not destroy the crystal structure of monoclinic Li3V2(PO4)3. Compared to the undoped Li3V2(PO4)3/C (abbreviated as C-LVP), the as-fabricated C-LVTP fibers present higher reversible capacity, superior high-rate capability as well as better cyclic property. Especially, the C-LVT7%P cathode delivers not only high capacities of 187.2 and 160.3 mAh g-1 at 0.5 and 10 C respectively, but also stable cyclic property with the reversible capacity of 135.8 mAh g- 1 at 20 C following 500-cycle spans. The good battery characteristics of CLVT7%P can be mainly ascribed to Ti4+ doping, which can increase the electrical conductivity and Li+ diffusion coefficient.
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