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Silicon nanoparticles grown on a reduced graphene oxide surface as high-performance anode materials for lithium-ion batteries

Title
Silicon nanoparticles grown on a reduced graphene oxide surface as high-performance anode materials for lithium-ion batteries
Author
김동원
Keywords
SI NANOPARTICLES; HIGH-CAPACITY; MESOPOROUS SILICON; MAGNESIOTHERMIC REDUCTION; NANOSTRUCTURED SILICON; RICE HUSKS; LI; SHEETS; CARBON; NANOCOMPOSITE
Issue Date
2016-03
Publisher
ROYAL SOC CHEMISTRY
Citation
RSC ADVANCES, v. 6, NO 30, Page. 25159-25166
Abstract
The growth of silicon nanoparticles on a graphene surface without forming the unwanted silicon carbide (SiC) phase has been challenging. Herein, the critical issues surrounding silicon anode materials for lithium-ion batteries, such as electrode pulverization, unstable solid electrolyte interphase and low electrical conductivity, have been addressed by growing silicon nanoparticles smaller than 10 nm, covalently bonded to a reduced graphene oxide (rGO) surface. The successful growth of SiC-free silicon nanoparticles covalently attached to the rGO surface was confirmed by using various spectroscopic and microscopic analyses. The rGO-Si delivered an initial discharge capacity of 1338.1 mA h g(-1) with capacity retention of 87.1% after the 100th cycle at a current rate of 2100 mA g(-1), and exhibited good rate capability. Such enhanced electrochemical performance is attributed to the synergistic effects of combining ultra-small silicon nanoparticles and rGO nanosheets. Here, rGO provides a continuous electron conducting network, whereas, ultra-small silicon particles reduce ionic diffusion path length and accommodate higher stress during volume expansion upon lithiation.
URI
http://pubs.rsc.org/en/Content/ArticleLanding/2016/RA/C5RA27877E#!divAbstracthttp://hdl.handle.net/20.500.11754/35697
ISSN
2046-2069
DOI
10.1039/c5ra27877e
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > CHEMICAL ENGINEERING(화학공학과) > Articles
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