期刊
ELECTROCHIMICA ACTA
卷 187, 期 -, 页码 389-396出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2015.11.094
关键词
N-doped TiO2; carbon coating; rate capability; anode material; lithium-ion battery
资金
- Shandong Provincial Natural Science Foundation, China [ZR2015EM016]
- Science and Technology Development Project of Shandong Province [2014GGX102009, 2015GGX102005]
- Independent Innovation Foundation of Shandong University, IIFSDU [2012ZD004]
Nitrogen-doped TiO2 nanoparticles coated with N-doped carbon are prepared by simply hydrolyzing tetrabutyl titanate to obtain TiO2 nanoparticles followed by heating the mixture of nanoparticles and urea at 550 degrees C for 5 h. The combination of simultaneously N-doping with coating carbon results in the enhancement in electronic and ionic conductivities, thus the modified TiO2 exhibits outstanding reversible capacities of 227.7, 204.0, 186.4, 160.6, 113.1 mAh g(-1) corresponding to current densities of 100, 200, 400, 800 and 1600 mA g(-1). In particular, the modified TiO2 could deliver an excellent long-term cycling capacity of 106.4 mAh g(-1) even cycled 2500 times at a high density of 500 mA g(-1) with an average capacity loss of only 0.016% per cycle. The modified TiO2 fabricated by this simple and economical method could serve as the anode material for lithium-ion batteries with high power-density. (C) 2015 Elsevier Ltd. All rights reserved.
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