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Mark Hermann Rummeli
나노구조물리 연구단
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Silicon carbide-free graphene growth on silicon for lithium-ion battery with high volumetric energy density Highly Cited Paper

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Title
Silicon carbide-free graphene growth on silicon for lithium-ion battery with high volumetric energy density
Author(s)
Son I.H.; Park J.H.; Kwon S.; Park S.; Mark H. Rummeli; Alicja Bachmatiuk; Song H.J.; Ku J.; Choi J.W.; Choi J.-M.; Doo S.-G.; Chang H.
Publication Date
2015-06
Journal
NATURE COMMUNICATIONS, v.6, no., pp.7393 -
Publisher
NATURE PUBLISHING GROUP
Abstract
Silicon is receiving discernable attention as an active material for next generation lithium-ion battery anodes because of its unparalleled gravimetric capacity. However, the large volume change of silicon over charge-discharge cycles weakens its competitiveness in the volumetric energy density and cycle life. Here we report direct graphene growth over silicon nanoparticles without silicon carbide formation. The graphene layers anchored onto the silicon surface accommodate the volume expansion of silicon via a sliding process between adjacent graphene layers. When paired with a commercial lithium cobalt oxide cathode, the silicon carbide-free graphene coating allows the full cell to reach volumetric energy densities of 972 and 700Whl -1 at first and 200th cycle, respectively, 1.8 and 1.5 times higher than those of current commercial lithium-ion batteries. This observation suggests that two-dimensional layered structure of graphene and its silicon carbide-free integration with silicon can serve as a prototype in advancing silicon anodes to commercially viable technology. © 2015 Macmillan Publishers Limited
URI
http://pr.ibs.re.kr/handle/8788114/1748
DOI
10.1038/ncomms8393
ISSN
2041-1723
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > Journal Papers (저널논문)
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