Journal
NANO ENERGY
Volume 2, Issue 6, Pages 1271-1278Publisher
ELSEVIER
DOI: 10.1016/j.nanoen.2013.06.006
Keywords
Lithium-ion batteries; Chemical reduction; Ag-coated Si; Highly conductive anode
Categories
Funding
- MSIP/C-ITRC [NIPA-2013-H0301-13-1009]
- WCU [R31-2008-000-20012-0]
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We describe a simple route for synthesizing electrically conductive Ag-coated Si anode materials with a high surface coverage via a simple chemical reduction process. A one-pot reduction process in the presence of alkylamine leads to a formation of Ag-coated Si particles at low temperature. The Ag-coated Si particles are highly dispersive and stable in aqueous and alcoholic solvents, and significantly enhance the poor electrical conductivity of Si particles. The electrically conductive Ag-coated Si electrodes exhibited excellent electrochemical performances, including a high reversible capacity (1550 mA h g(-1) at 0.1 C rate), a stable cycling performance (a specific capacity of 1320 mA h g(-1) at 0.2 C rate after 100 cycles), and excellent rate capability (a charge capacity of 640 mA h g(-1) at 5 C rate). This simple route may open up an effective way to make other anode and cathode materials for practical lithium-ion battery applications. (C) 2013 Elsevier Ltd. All rights reserved.
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