期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 701, 期 -, 页码 99-106出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2017.01.067
关键词
Li4Ti5O12; Nanofibers; Electrospinning; Low-temperature; Lithium-ion batteries
资金
- National Science Foundation of China [51372060, 21676067, 51402289]
- Opening Project of CAS Key Laboratory of Materials for Energy Conversion [KF2016005]
- State Grid Corporation of China
Li3.9Cr0.3Ti4.8O12 nanofibers with one-dimensional (1D) morphology and excellent electrical conductivity are prepared via a facile electrospinning technique. The as-prepared Li3.9Cr0.3Ti4.8O12 nanofibers exhibit excellent lithium storage performance with superior rate capability and low-temperature performance: 140 mAh g(-1) at 10 C and 91 mAh g(-1) at 50 C rates at room temperature, 100 mAh g(-1) at 1 C rate at 20 degrees C. The superior electrochemical performance of Li-3.9Cr0.3Ti4.8O12 nanofibers is attributed to the 1D nano-architectures composed of nanocrystals and the reduced grain size in Li3.9Cr0.3Ti4.8O12, both of which facilitate the Li+ ion transport. The Li3.9Cr0.3Ti4.8O12 nanofibers also have a high Ti3+ concentration and an in-situ surface coating layer of Li2CrO4, which could enhance intraparticle and interparticle electronic conductivities of Li3.9Cr0.3Ti4.8O12 grains, respectively. (C) 2017 Elsevier B.V. All rights reserved.
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