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

Title
Nanostructured silicon/silicide/carbon composite anodes with controllable voids for Li-ion batteries
Authors
조영환강인영장주영김문수박진우김재헌
Keywords
Fe-Si alloy; Porous nanocomposite; Water-soluble compound; Carbon network; Li-ion battery
Issue Date
2017-04
Publisher
Materials & design
Citation
VOL 120-237
Abstract
Three-dimensional (3D) carbon-network-supported Si/silicide nanocomposite anodes with controllable voids are prepared using ferrosilicon, NaCl, and polyfurfuryl alcohol (PFA) resin as the starting materials. Analysis of the microstructures and the phase compositions confirms the complete removal of NaCl 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.
URI
http://pubs.kist.re.kr/handle/201004/66050
ISSN
0264-1275
Appears in Collections:
KIST Publication > Article
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