期刊
JOURNAL OF POWER SOURCES
卷 361, 期 -, 页码 326-333出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2017.06.076
关键词
Titanium dioxide; Carbon-coating; Surfactant; Carbon source; Calcination temperature; Sodium-ion battery
资金
- MOST [2016YFA0202500]
- NSFC [51471089, 51501072]
- MOE [IRT13R30]
- NSFT [17JCYBJC17900]
- 111 Project [B12015]
To enhance the electronic conductivity of TiO2, carbon-coating has been used as a simple and effective method for improving the electrochemical performances of TiO2 in sodium ion batteries. In this work, considering the internal connection between TiO2 and the coated carbon-layer, we synthesized carbon coated TiO2 composites (TiO2/C) via hydrothermal method and subsequent calcination, assisted with different types of surfactant as carbon sources. Due to strong electrostatic attraction, cationic surfactant CTAB (cetyltrimethyl ammonium bromide) generates a uniformly-coated carbon layer onto TiO2 surface, which enables good electronic conductivity and fast kinetics of the product. Therefore, TiO2/C assisted with CTAB as carbon source (TiO2/C-C) shows optimal sodium storage performance with excellent specific capacity (303 mA h g(-1) at 0.1 C) and satisfying cycling stability, offering promising anode for constructing high capacity sodium ion batteries. (C) 2017 Elsevier B.V. All rights reserved.
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