期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 604, 期 -, 页码 226-232出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2014.03.069
关键词
Boron-doped titanium oxide; Anode active material; High-rate lithium-ion battery; Electrochemical characterization
资金
- Ministry of Knowledge Economy (MKE)
- Korea Institute for Advancement of Technology (KIAT) through the Inter-ER Cooperation Projects [R0000497]
- Basic Science Research Program - Ministry of Education, Science and Technology [2010-0024077]
- National Research Foundation of Korea [2010-0024077, 22A20130000071] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Boron(B)-doped TiO2 (BT) materials are synthesized through a simple one-pot process using a sol-gel method, and are employed as anode materials in Li-ion batteries. The increase of B-dopant concentration up to 10.4 wt% in BT samples increases the interplanar spacing between TiO2 lattices from 3.33 angstrom to 4.33 angstrom, and the BET surface area from 27.7 m(2) g (1) to 90.6 m(2) g (1). Additionally, the BT sample containing a relatively large amount of B possesses cylindrical pores that are favorable for lithium-ion transfer, leading to the highest diffusion coefficient. Consequently, the BT anodes with high B-dopant concentration exhibit significantly-improved cyclic capacities at 100 cycles: 166.9 mA h g (1) at 1 C and 119.4 mA h g (1) at 10 C, whereas the non-doped BT sample, TiO2, exhibits 107.7 mA h g (1) at 1 C and 19.9 mA h g (1) at 10 C at 100 cycles. (C) 2014 Elsevier B.V. All rights reserved.
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