DC Field | Value | Language |
---|---|---|
dc.contributor.author | Shin, Jungwoo | ko |
dc.contributor.author | Park, Kyusung | ko |
dc.contributor.author | Ryu, Won-Hee | ko |
dc.contributor.author | Jung, Ji Won | ko |
dc.contributor.author | Kim, Il-Doo | ko |
dc.date.accessioned | 2015-04-07T04:27:36Z | - |
dc.date.available | 2015-04-07T04:27:36Z | - |
dc.date.created | 2014-12-22 | - |
dc.date.created | 2014-12-22 | - |
dc.date.issued | 2014-08 | - |
dc.identifier.citation | NANOSCALE, v.6, no.21, pp.12718 - 12726 | - |
dc.identifier.issn | 2040-3364 | - |
dc.identifier.uri | http://hdl.handle.net/10203/195168 | - |
dc.description.abstract | Carbon nanofibers encapsulating Si nanoparticles (CNFs/SiNPs) were prepared via an electrospinning method and chemically functionalized with 3-aminopropyltriethoxysilane (APS) to be grafted onto graphene oxide (GO). As a result, the thin and flexible GO, which exhibits a negative charge in aqueous solution, fully wrapped around the APS-functionalized CNFs with a positive surface charge via electrostatic self-assembly. After the formation of chemical bonds between the epoxy groups on GO and the amine groups in APS via an epoxy ring opening reaction, the GO was chemically reduced to a reduced graphene oxide (rGO). Electrochemical and morphological characterizations showed that capacity loss by structural degradation and electrolyte decomposition on Si surface were significantly suppressed in the rGOwrapped CNFs/SiNPs (CNFs/SiNPs@rGO). Superior capacities were consequently maintained for up to 200 cycles at a high current density (1048 mA h g(-1) at 890 mA g(-1)) compared to CNFs/SiNPs without the rGO wrapping (304 mA h g(-1) at 890 mA g(-1)). Moreover, the resistance of the SEI layer and charge transfer resistance were also considerably reduced by 24% and 88%, respectively. The described graphene wrapping offers a versatile way to enhance the mechanical integrity and electrochemical stability of Si composite anode materials. | - |
dc.language | English | - |
dc.publisher | ROYAL SOC CHEMISTRY | - |
dc.subject | SILICON NANOPARTICLES | - |
dc.subject | LITHIUM STORAGE | - |
dc.subject | PERFORMANCE | - |
dc.subject | OXIDE | - |
dc.subject | SHEETS | - |
dc.subject | COMPOSITES | - |
dc.subject | NANOSHEETS | - |
dc.subject | NANOTUBES | - |
dc.subject | OXIDATION | - |
dc.subject | GRAPHITE | - |
dc.title | Graphene wrapping as a protective clamping layer anchored to carbon nanofibers encapsulating Si nanoparticles for a Li-ion battery anode | - |
dc.type | Article | - |
dc.identifier.wosid | 000344997500064 | - |
dc.identifier.scopusid | 2-s2.0-84907995856 | - |
dc.type.rims | ART | - |
dc.citation.volume | 6 | - |
dc.citation.issue | 21 | - |
dc.citation.beginningpage | 12718 | - |
dc.citation.endingpage | 12726 | - |
dc.citation.publicationname | NANOSCALE | - |
dc.identifier.doi | 10.1039/c4nr03173c | - |
dc.contributor.localauthor | Kim, Il-Doo | - |
dc.contributor.nonIdAuthor | Shin, Jungwoo | - |
dc.contributor.nonIdAuthor | Park, Kyusung | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordPlus | SILICON NANOPARTICLES | - |
dc.subject.keywordPlus | LITHIUM STORAGE | - |
dc.subject.keywordPlus | PERFORMANCE | - |
dc.subject.keywordPlus | OXIDE | - |
dc.subject.keywordPlus | SHEETS | - |
dc.subject.keywordPlus | COMPOSITES | - |
dc.subject.keywordPlus | NANOSHEETS | - |
dc.subject.keywordPlus | NANOTUBES | - |
dc.subject.keywordPlus | OXIDATION | - |
dc.subject.keywordPlus | GRAPHITE | - |
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