Amorphous GeOx-Coated Reduced Graphene Oxide Balls with Sandwich Structure for Long-Life Lithium-Ion Batteries
DC Field | Value | Language |
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dc.contributor.author | Choi, Seung Ho | - |
dc.contributor.author | Jung, Kyeong Youl | - |
dc.contributor.author | Kang, Yun Chan | - |
dc.date.accessioned | 2021-09-04T14:22:51Z | - |
dc.date.available | 2021-09-04T14:22:51Z | - |
dc.date.created | 2021-06-16 | - |
dc.date.issued | 2015-07-01 | - |
dc.identifier.issn | 1944-8244 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/93050 | - |
dc.description.abstract | Amorphous GeOx-coated reduced graphene oxide (rGO) balls with sandwich structure are prepared via a spray-pyrolysis process using polystyrene (PS) nanobeads as sacrificial templates. This sandwich structure is formed by uniformly coating the exterior and interior of few-layer rGO with amorphous GeOx layers. X-ray photoelectron spectroscopy analysis reveals a Ge:O stoichiometry ratio of 1:1.7. The amorphous GeOx-coated rGO balls with sandwich structure have low charge-transfer resistance and fast Li+-ion diffusion rate. For example, at a current density of 2 A g(-1), the GeOx-coated rGO balls with sandwich and filled structures and the commercial GeO2 powders exhibit initial charge capacities of 795, 651, and 634 mA h g(-1), respectively; the corresponding 700th-cycle charge capacities are 758, 579, and 361 mA h g(-1). In addition, at a current density of 5 A g(-1), the rGO balls with sandwich structure have a 1600th-cycle reversible charge capacity of 629 mA h g(-1) and a corresponding capacity retention of 90.7%, as measured from the maximum reversible capacity at the 100th cycle. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | AMER CHEMICAL SOC | - |
dc.subject | HIGH-PERFORMANCE ANODE | - |
dc.subject | VERTICALLY ALIGNED GRAPHENE | - |
dc.subject | ELECTROCHEMICAL PERFORMANCE | - |
dc.subject | ENHANCED-PERFORMANCE | - |
dc.subject | ELECTRODE MATERIALS | - |
dc.subject | COMPOSITE POWDERS | - |
dc.subject | CARBON | - |
dc.subject | NANOPARTICLES | - |
dc.subject | ENERGY | - |
dc.subject | SILICON | - |
dc.title | Amorphous GeOx-Coated Reduced Graphene Oxide Balls with Sandwich Structure for Long-Life Lithium-Ion Batteries | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Kang, Yun Chan | - |
dc.identifier.doi | 10.1021/acsami.5b02846 | - |
dc.identifier.scopusid | 2-s2.0-84934756626 | - |
dc.identifier.wosid | 000357436800027 | - |
dc.identifier.bibliographicCitation | ACS APPLIED MATERIALS & INTERFACES, v.7, no.25, pp.13952 - 13959 | - |
dc.relation.isPartOf | ACS APPLIED MATERIALS & INTERFACES | - |
dc.citation.title | ACS APPLIED MATERIALS & INTERFACES | - |
dc.citation.volume | 7 | - |
dc.citation.number | 25 | - |
dc.citation.startPage | 13952 | - |
dc.citation.endPage | 13959 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
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 | HIGH-PERFORMANCE ANODE | - |
dc.subject.keywordPlus | VERTICALLY ALIGNED GRAPHENE | - |
dc.subject.keywordPlus | ELECTROCHEMICAL PERFORMANCE | - |
dc.subject.keywordPlus | ENHANCED-PERFORMANCE | - |
dc.subject.keywordPlus | ELECTRODE MATERIALS | - |
dc.subject.keywordPlus | COMPOSITE POWDERS | - |
dc.subject.keywordPlus | CARBON | - |
dc.subject.keywordPlus | NANOPARTICLES | - |
dc.subject.keywordPlus | ENERGY | - |
dc.subject.keywordPlus | SILICON | - |
dc.subject.keywordAuthor | germanium oxide | - |
dc.subject.keywordAuthor | graphene composite | - |
dc.subject.keywordAuthor | anode material | - |
dc.subject.keywordAuthor | lithium-ion battery | - |
dc.subject.keywordAuthor | spray pyrolysis | - |
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