Journal
NANO ENERGY
Volume 2, Issue 1, Pages 146-152Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nanoen.2012.08.009
Keywords
Lithium-ion batteries; Catalytic etching; Porous silicon monoxide; Galvanic reaction
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Funding
- Conversing Research Center Program through the Ministry of Education, Science and Technology [2012K001251]
- MKE/ITRC program of NIPA [NIPA-2012-H0301-12-1009]
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We describe a simple process for synthesizing three-dimensional porous silicon monoxide anode materials from bulk silicon monoxide powders by combining a galvanic displacement reaction and metal catalytic etching process. Silver nanoparticles that act as a catalyst were deposited on the surface of silicon monoxide via a galvanic reaction. Subsequently, the silver-deposited silicon monoxide particles were chemically etched to synthesize porous silicon monoxide particles, without changing the chemical and physical properties of SiO. The carbon-coated porous silicon monoxide anodes exhibited excellent electrochemical properties, including a high specific capacity (1520 mA h g(-1)), a stable cycling retention (reversible capacity of 1490 mAh g(-1), after 50 cycles), and a high rate capability (74% at 3 C rate, compared to 0.1 C rate). This process may open up an effective way to make other porous semiconducting materials for a rich variety of applications, including lithium-ion batteries. (C) 2012 Elsevier Ltd. All rights reserved.
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