Highly dispersive and electrically conductive silver-coated Si anodes synthesized via a simple chemical reduction process

被引:69
作者
Yoo, Seungmin [1 ]
Lee, Jung-In [1 ]
Ko, Seunghee [1 ]
Park, Soojin [1 ]
机构
[1] UNIST, Interdisciplinary Sch Green Energy, Ulsan 689798, South Korea
关键词
Lithium-ion batteries; Chemical reduction; Ag-coated Si; Highly conductive anode; NANOSTRUCTURED ELECTRODE MATERIALS; LITHIUM-ION; STORAGE PERFORMANCE; NEGATIVE ELECTRODES; SILICON PARTICLES; SURFACE; LI; CHALLENGES;
D O I
10.1016/j.nanoen.2013.06.006
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
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.
引用
收藏
页码:1271 / 1278
页数:8
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