Hollow Graphene as an Expansion-Inhibiting Electrical Interconnector for Silicon Electrodes in Lithium-Ion Batteries
DC Field | Value | Language |
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dc.contributor.author | Park, Hyeong-Il | - |
dc.contributor.author | Park, You Kyung | - |
dc.contributor.author | Kim, Sun Kyung | - |
dc.contributor.author | Jang, Hee Dong | - |
dc.contributor.author | Kim, Hansu | - |
dc.date.accessioned | 2022-07-06T16:00:14Z | - |
dc.date.available | 2022-07-06T16:00:14Z | - |
dc.date.created | 2021-11-22 | - |
dc.date.issued | 2021-08 | - |
dc.identifier.issn | 1944-8244 | - |
dc.identifier.uri | https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/141362 | - |
dc.description.abstract | Huge volume changes of silicon particles upon alloying and dealloying reactions with lithium are a major reason for the poor cycle performance of silicon-based anodes for lithium-ion batteries. To suppress dimensional changes of silicon is a key strategy in attempts to improve the electrochemical performance of silicon-based anodes. Here, we demonstrate that a conductive agent can be exploited to offset the mechanical strain imposed on silicon electrodes caused by volume expansion of silicon associated with lithiation. Hollow graphene particles as a conductive agent inhibit volume expansion by absorbing the swelling of silicon upon lithiation through flattening the free voids surrounded by the graphene shell. As a result, silicon electrodes with hollow graphene showed a height expansion of 20.4% after full lithiation with a capacity retention of 69% after 200 cycles, while the silicon electrode with conventional carbon black showed an expansion of 76.8% under the same conditions with a capacity retention of 38%. Some of the deflated hollow graphene returns to its initial shape on delithiation due to the mechanical flexibility of the graphene shell layer. Such a robust microstructure of a silicon electrode incorporating hollow graphene that serves as both an expansion inhibitor and a conductive agent greatly improves capacity retention compared with silicon electrodes with the conventionally used carbon black. | - |
dc.language | 영어 | - |
dc.language.iso | en | - |
dc.publisher | AMER CHEMICAL SOC | - |
dc.title | Hollow Graphene as an Expansion-Inhibiting Electrical Interconnector for Silicon Electrodes in Lithium-Ion Batteries | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Kim, Hansu | - |
dc.identifier.doi | 10.1021/acsami.1c08969 | - |
dc.identifier.scopusid | 2-s2.0-85112320034 | - |
dc.identifier.wosid | 000683741400047 | - |
dc.identifier.bibliographicCitation | ACS APPLIED MATERIALS & INTERFACES, v.13, no.30, pp.35759 - 35766 | - |
dc.relation.isPartOf | ACS APPLIED MATERIALS & INTERFACES | - |
dc.citation.title | ACS APPLIED MATERIALS & INTERFACES | - |
dc.citation.volume | 13 | - |
dc.citation.number | 30 | - |
dc.citation.startPage | 35759 | - |
dc.citation.endPage | 35766 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.isOpenAccess | N | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Science & Technology - Other Topics | - |
dc.relation.journalResearchArea | Materials Science | - |
dc.relation.journalWebOfScienceCategory | Nanoscience & Nanotechnology | - |
dc.relation.journalWebOfScienceCategory | Materials Science, Multidisciplinary | - |
dc.subject.keywordPlus | ANODE | - |
dc.subject.keywordPlus | CARBON | - |
dc.subject.keywordPlus | STORAGE | - |
dc.subject.keywordPlus | NANOCOMPOSITE | - |
dc.subject.keywordPlus | NANOSPHERES | - |
dc.subject.keywordPlus | PARTICLES | - |
dc.subject.keywordPlus | SPHERES | - |
dc.subject.keywordPlus | MATRIX | - |
dc.subject.keywordAuthor | silicon-based electrode | - |
dc.subject.keywordAuthor | volume expansion | - |
dc.subject.keywordAuthor | conductive agent | - |
dc.subject.keywordAuthor | hollow graphene | - |
dc.subject.keywordAuthor | electrode structure | - |
dc.identifier.url | https://pubs.acs.org/doi/10.1021/acsami.1c08969 | - |
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