期刊
JOURNAL OF POWER SOURCES
卷 306, 期 -, 页码 459-466出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2015.12.064
关键词
Lithium-ion battery; Nonstoichiometric silicon; oxide@carbon; Anode; Nanorods; Electrochemical performance
资金
- Natural Science Foundation of China [51374175, 21576030]
- Lithium-ion Battery Innovative Team Project of China West Normal University [CXTD2015-1]
- Foundation of enterprises, universities and research institutes of Jiangsu Province [BY2014037-31]
To develop high-capacity anode materials for lithium-ion batteries with long cycle life, SiOx@C composite nanorods are fabricated by a template assisted hydrothermal route followed by pyrolysis, using ethyltriethoxysilanes (EtSi(OEt)(3)), resorcinol/formaldehyde (RF) and cetyltrimethyl ammonium bromide (CTAB) as starting materials. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), Raman spectroscopy (RA), X-ray photoelectron spectroscopy (XPS) and elemental analysis (EA) are employed to characterize the morphology, microstructure and composition of the as-prepared composite. The composite shows a rod-like morphology, which is composed of 65.4 wt% SiOx (x = 1.12) and 34.6 wt% C, and individual rod contains numerous interconnected nanospheres. When used as anodes in lithium-ion batteries, the SiOx@C nanorods exhibit a discharge capacity of about 720 mAh g(-1) after 350 cycles at a current density of 100 mA g(-1). The excellent electrochemical performance is attributed to the enhanced conductivity and unique material structure of the composite. (C) 2015 Elsevier B.V. All rights reserved.
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