Surface Modification and Electrochemical Performances of Silicon-based Film Anodes for Lithium Ion Batteries

Title
Surface Modification and Electrochemical Performances of Silicon-based Film Anodes for Lithium Ion Batteries
Authors
최원창김정섭변동진이중기
Issue Date
2012-05
Publisher
221st ECS Meeing
Abstract
Figure 1 compares the surface morphology of bare silicon film and porous silicon film with nano-wired structure prepared by chemical etching techniques. As shown in the Fig. 1, well-connected nanowires could be obtained employing chemical etching method, implying that the volume expansion of silicon anodes can be containable during charge-discharge process. We also investigate the surface morphology of electrodes by scanning electron microscopy after first charge-discharge process for the bare and chemically etched silicon anodes. Although the bare silicon film was exfoliated mechanically from current collector even after 1 cycle, chemically etched silicon anodes maintained the well-attached shape with current collector, suggesting that the nano-wired structure can support against the volume expansion of electrodes during cycling. A systematic analysis combined with stress modeling is now going on to reveal the factors influencing on the electrochemical performances of silicon anodes for lithium ion battery.
URI
http://pubs.kist.re.kr/handle/201004/43096
Appears in Collections:
KIST Publication > Conference Paper
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