Nanostructured silicon/silicide/carbon composite anodes with controllable voids for Li-ion batteries

被引：15
作者：
Kang, Inyeong [1 ,2 ]
Jang, Juyoung [2 ,3 ]
Kim, Moon-Soo [4 ]
Park, Jin-Woo [1 ]
Kim, Jae-Hun [4 ]
Cho, Young Whan [2 ]
机构：
[1] Yonsei Univ, Dept Mat Sci & Engn, Seoul 03722, South Korea
[2] Korea Inst Sci & Technol, High Temp Energy Mat Res Ctr, Seoul 02792, South Korea
[3] Seoul Natl Univ, Dept Mat Sci & Engn, Seoul 08826, South Korea
[4] Koolanin Univ, Sch Adv Mat Engn, Seoul 02707, South Korea
来源：
MATERIALS & DESIGN | 2017年 / 120卷
关键词：
Fe-Si alloy; Porous nanocomposite; Water-soluble compound; Carbon network; Li-ion battery; STORAGE PERFORMANCE; NEGATIVE ELECTRODES; GREEN SYNTHESIS; SILICON ANODES; LITHIUM; SI; NANOCOMPOSITES; CAPACITY; NANOPARTICLES; INSERTION;
D O I：
10.1016/j.matdes.2017.02.018
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Three-dimensional (3D) carbon-network-supported Si/silicide nanocomposite anodes with controllable voids are prepared using ferrosilicon, NaCI, and polyfurfuryl alcohol (PFA) resin as the starting materials. Analysis of the microstructures and the phase compositions confirms the complete removal of NaCI and the consequent formation of voids supported by a glassy carbon network, residing in between the nanostructured Si/silicide composite particles. Coin-half cell tests demonstrate the significantly improved cycling performance of the Si/ silicide/carbon nanocomposites compared with that of the alloy powder without controllable voids. The electrode prepared from the coated alloy with voids maintains approximately 66% of its initial capacity after 100 cycles and its Coulombic efficiency rapidly increases to 99% after several cycles. (C) 2017 Elsevier Ltd. All rights reserved.
引用
收藏
页码：230 / 237
页数：8
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