期刊
ELECTROCHIMICA ACTA
卷 63, 期 -, 页码 100-104出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2011.12.077
关键词
Li4Ti5O12; Microwave-assisted hydrothermal method; Lithium ion batteries; Anode material
资金
- General Motors of Canada
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- Canada Research Chair (CRC) Program
- Canada Foundation for Innovation (CFI)
- Ontario Research Fund (ORF)
- Ontario Early Researcher Award (ERA)
- University of Western Ontario
Nanoflower-like and nanoparticle spinel Li4Ti5O12 were synthesized by a microwave-assisted hydrothermal (MH) method following calcination. As-prepared Li4Ti5O12 was characterized by scanning electron microscopy, transmission electron microscopy. X-ray powder diffraction and cyclic voltammetry. The nanoflower-like and nanoparticle Li4Ti5O12 exhibited discharge capacities of 176.7 and 109.8 mAh g(-1), respectively, for the first cycle, and maintained reversible capacities of 38.4 and 91.7 mAh g(-1), respectively, at a 1.1 C-rate (200 mA g(-1)) after 100 cycles. The better performance of nanoflower-like Li4Ti5O12 relative to nanoparticle Li4Ti5O12 is attributed to the larger specific surface area and shorter Li+ diffusion path of the former relative to the latter. The MH preparation process is straightforward and fast; thus it shows promise for widespread lithium ion battery applications. (C) 2012 Elsevier Ltd. All rights reserved.
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