期刊
MATERIALS LETTERS
卷 144, 期 -, 页码 50-53出版社
ELSEVIER
DOI: 10.1016/j.matlet.2015.01.022
关键词
Germanium; Carbon nanotube; Electrodeposition; Nanocomposites; Li ion batteries
资金
- National Natural Science Foundation of China [51010005, 91216123, 51174063, 21103036]
- Natural Science Funds for Distinguished Young Scholar of Heilongjiang Province
- Natural Science Foundation of Heilongjiang Province [E201436]
- International Science & Technology Cooperation Program of China [2013DFR10630]
Germanium nanoparticles (Ge-NPs) are combined with carbon nanotubes (CNTs) to fabricate anodes for Li-ion batteries through the electrodeposition of Ge from ionic liquids on the surface of the CNTs. The latter are electrophoretically deposited on a copper collector at room temperature without any binders, with a good electrical contact achieved nonetheless between the active material and the collector. In the composite, the CNTs readily accommodate the large volume changes of the Ge particles during cycling. The composite exhibits better reversible lithiation-delithiation behavior, an improved rate performance, and also has better electrochemical properties than Ge-NPs. The nanocomposite anode developed here delivers a reversible capacity of 810 mA hig after 100 cycles at 0.2 C. (C) 2015 Elsevier B.V. All rights reserved.
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