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Author

Cho, Jaephil
Nano Energy Storage Materials Lab (NESM)
Research Interests
  • Li-ion battery, metal-air battery, redox-flow battery, flexible battery .

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Porous Si anode materials for lithium rechargeable batteries

Cited 104 times inthomson ciCited 91 times inthomson ci
Title
Porous Si anode materials for lithium rechargeable batteries
Author
Cho, Jaephil
Keywords
Anode material; Electrical integrity; Few-cycle; High capacity; Ionic character; Lithium rechargeable batteries; Mechanical stress; Mesoporous; Porous particle; Porous si; Volume change; Volume expansion
Issue Date
2010
Publisher
ROYAL SOC CHEMISTRY
Citation
JOURNAL OF MATERIALS CHEMISTRY, v.20, no.20, pp.4009 - 4014
Abstract
Si anode materials for lithium rechargeable batteries have received much attention due to their high capacity. The Si itself can alloy with lithium up to Li(4.4)Si, corresponding to 4212 mAh/g (4.4Li + Si <-> 4Li(4.4)Si). However, the large volume expansion of over 300% due to the formation of various Li(x)Si(y) phases generates enormous mechanical stress within the ionic character material, which becomes pulverized during the first few cycles and loses electrical integrity. Although such a drastic volume change cannot be removed completely, the degree of the volume change can be effectively reduced to utilize its application in anode materials. In this regard, when porous particles contain ordered pores, these pores act as a buffer layer for volume changes, demonstrating another means of controlling the volume expansion/contraction. In this review, recent developments in porous Si anodes, such as mesoporous nanowires, 3D porous particles, and nanotubes have been highlighted.
URI
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DOI
http://dx.doi.org/10.1039/b923002e
ISSN
0959-9428
Appears in Collections:
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