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Titanium silicide coated porous silicon nanospheres as anode materials for lithium ion batteries

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Title
Titanium silicide coated porous silicon nanospheres as anode materials for lithium ion batteries
Author(s)
Young Min Kim; Ahn J.; Seung-Ho Yu; Dong Young Chung; Kyung Jae Lee; Lee J.-K.; Yung Eun Sung
Publication Date
2015-01
Journal
ELECTROCHIMICA ACTA, v.151, no., pp.256 - 262
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Abstract
We report on the facile synthesis of porous silicon structure via magnesiothermic reduction followed by coating of the surface with TiSi2. These modifications not only showed significant promise in overcoming the drastic volume change during charge and discharge cycles but also in improving the relatively low conductivity of silicon. The synthesized porous structure with a highly electrically conductive coating layer significantly enhanced the electrochemical performance in terms of cyclic stability and rate capability. The TiSi2 coating layer, which has good electrical conductivity and physical strength, enhances the conductivity and maintains the Si structure during cycling. This combination of porous structure via magnesiothermic reduction and highly conductive TiSi2 coating provides a synergistic effect, which can be seen in the improvements in electrochemical performance. This synthesis demonstrates a promising method for producing high capacity anode materials for next generation LIBs. ã 2014 Elsevier Ltd. All rights reserved.
URI
https://pr.ibs.re.kr/handle/8788114/2141
ISSN
0013-4686
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > Journal Papers (저널논문)
Files in This Item:
18.Electrochimica Acta_201501.pdfDownload

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