期刊
ELECTROCHIMICA ACTA
卷 281, 期 -, 页码 142-151出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2018.05.155
关键词
Hydrogen peroxide; Spinel Li4Ti5O12; Commercial titania; Low temperature; Energy storage
资金
- National Natural Science Foundation of China [21573085, 21377044]
- Key Project of Natural Science Foundation of Hubei Province [2015CFA037]
- self-determined research funds of CCNU from the colleges' basic research and operation of MOE [CCNU18TS034]
- Hua Bo Plan of Central China Normal University
Spinel Li4Ti5O12 known as a zero-strain anode material for Li-ion battery has attracted much attention because of its superior safety and stability. Herein, we report a novel H2O2-assisted one-step hydrothermal method to synthesize different ratio Li4Ti5O12/TiO2 composites with the same amount of raw materials. For the first time, Li4Ti5O12 was prepared directly from commercial titania with the presence of H2O2, and different proportion Li4Ti5O12/TiO2 composites were fabricated only by adjusting the amount of H2O2. The reaction mechanism of the novel H2O2-assisted method was clearly investigated, and H2O2 plays a crucial role in the formation of intermediate Li1.81H0.19Ti2O5 center dot 2H(2)O. Further, the electrochemical performance of different ratio Li4Ti5O12/TiO2 composites have been investigated. This facile method is also applicable for the preparation of Na2Ti6O13/TiO2 material, and provides us the new way to fabricate composite materials. (c) 2018 Elsevier Ltd. All rights reserved.
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