期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 784, 期 -, 页码 165-172出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2019.01.061
关键词
TiO2; Lithium-ion battery; N-Ti-O bond; Li+ storage; Electrochemical performance
资金
- National Key Technology RD Program [2013BAF09B02]
- National Natural Science Foundation of China [51472152]
- Innovation Team Assistance Foundation of Shaanxi Province [2013KCT-06]
- Scientific Special Foundation of Shaanxi Province Office of Education [15JK1074]
- Graduate Innovation Fund of Shaanxi University of Science and Technology
In this article, nitrogen is successfully doped into both components of TiO2/reduced graphene oxide composites via a hydrothermal-post thermal treatment. The N-doped TiO2/reduced graphene oxide electrode presents obviously higher Li-ion storage performance (270 mAh g(-1) at current density of 0.1 A g(-1)) than the undoped product. This N-doped composite could also exhibit superior long-term cycling stability with a reversible capacity of 210 mAh g(-1) even after 2000 cycles. Further electrochemical analysis finds the number of active Li-ions is increased from the formation of N-Ti-O and N-C bonds, which greatly improves the charge/discharge process in the anode for lithium-ion batteries. This work may improve understanding of the doping effects of various elements present in electrode materials. (C) 2019 Elsevier B.V. All rights reserved.
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