A chemically activated graphene-encapsulated LiFePO4 composite for high-performance lithium ion batteries
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 유승호 | - |
dc.date.accessioned | 2022-04-11T11:43:18Z | - |
dc.date.available | 2022-04-11T11:43:18Z | - |
dc.date.created | 2022-04-08 | - |
dc.date.issued | 2013-01 | - |
dc.identifier.issn | 2040-3364 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/140012 | - |
dc.description.abstract | A composite of modified graphene and LiFePO4 has been developed to improve the speed of charging-discharging and the cycling stability of lithium ion batteries using LiFePO4 as a cathode material. Chemically activated graphene (CA-graphene) has been successfully synthesized via activation by KOH. The as-prepared CA-graphene was mixed with LiFePO4 to prepare the composite. Microscopic observation and nitrogen sorption analysis have revealed the surface morphologies of CA-graphene and the CA-graphene/LiFePO4 composite. Electrochemical properties have also been investigated after assembling coin cells with the CA-graphene/LiFePO4 composite as a cathode active material. Interestingly, the CA-graphene/LiFePO4 composite has exhibited better electrochemical properties than the conventional graphene/LiFePO4 composite as well as bare LiFePO4, including exceptional speed of charging-discharging and excellent cycle stability. That is because the CA-graphene in the composite provides abundant porous channels for the diffusion of lithium ions. Moreover, it acts as a conducting network for easy charge transfer and as a divider, preventing the aggregation of LiFePO4 particles. Owing to these properties of CA-graphene, LiFePO4 could demonstrate enhanced and stably long-lasting electrochemical pe | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | ROYAL SOC CHEMISTRY | - |
dc.title | A chemically activated graphene-encapsulated LiFePO4 composite for high-performance lithium ion batteries | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | 유승호 | - |
dc.identifier.doi | 10.1039/c3nr02738d | - |
dc.identifier.bibliographicCitation | NANOSCALE, v.5, no.18, pp.8647 - 8655 | - |
dc.relation.isPartOf | NANOSCALE | - |
dc.citation.title | NANOSCALE | - |
dc.citation.volume | 5 | - |
dc.citation.number | 18 | - |
dc.citation.startPage | 8647 | - |
dc.citation.endPage | 8655 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
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