Nano-scale uniform distribution of Ge/Cu3Ge phase and its electrochemical performance for lithium-ion batteries
DC Field | Value | Language |
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dc.contributor.author | Chae, Oh B. | - |
dc.contributor.author | Park, Sangjin | - |
dc.contributor.author | Ku, Jun H. | - |
dc.contributor.author | Ryu, Ji Heon | - |
dc.contributor.author | Oh, Seung M. | - |
dc.date.accessioned | 2023-03-27T07:42:49Z | - |
dc.date.available | 2023-03-27T07:42:49Z | - |
dc.date.created | 2023-03-27 | - |
dc.date.issued | 2010-03 | - |
dc.identifier.issn | 0013-4686 | - |
dc.identifier.uri | https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/87361 | - |
dc.description.abstract | A germanium/copper germanide/carbon (Ge/Cu3Ge/C) composite is prepared by the Pechini method using GeO2, CuSO4. and citric acid/ethylene glycol as the Ge, Cu and carbon sources, respectively. The microstructure and electrochemical properties of this nano-composite are compared to those of germanium/carbon (Ge/C) that is prepared without the copper precursor. In the latter composite, irregular-shaped submicron-sized (0.4-0.5 mu m) Ge particles are dispersed inside a carbon matrix. In the former, however, sphere-shaped nano-sized (<100 nm) Ge particles are produced, inside of which a Cu3Ge phase is uniformly dispersed in nano-scale. The pure Ge component in both electrodes is lithiated up to Li15Ge4 after a lithiation down to 0.0 V at a current density of 100 mA g(-1). The Cu3Ge-containing electrode gives a superior cycle and rate performance to that of the Cu3Ge-free counterpart. This difference has been ascribed to the favorable roles provided by the nano-sized Cu3Ge phase that is intimately contacted with the nano-sized Ge particles within a sphere. The electrochemical dilatometry study reveals that the electrode swelling is much smaller for the Cu3Ge-containing electrode, illustrating that the electrochemically inactive Cu3Ge phase serves as a buffer against a massive volume change encountered in the Ge component. (C) 2010 Elsevier Ltd. All rights reserved. | - |
dc.language | 영어 | - |
dc.language.iso | en | - |
dc.publisher | PERGAMON-ELSEVIER SCIENCE LTD | - |
dc.relation.isPartOf | ELECTROCHIMICA ACTA | - |
dc.title | Nano-scale uniform distribution of Ge/Cu3Ge phase and its electrochemical performance for lithium-ion batteries | - |
dc.type | Article | - |
dc.type.rims | ART | - |
dc.description.journalClass | 1 | - |
dc.identifier.wosid | 000275985700043 | - |
dc.identifier.doi | 10.1016/j.electacta.2009.12.076 | - |
dc.identifier.bibliographicCitation | ELECTROCHIMICA ACTA, v.55, no.8, pp.2894 - 2900 | - |
dc.description.isOpenAccess | N | - |
dc.identifier.scopusid | 2-s2.0-76449115652 | - |
dc.citation.endPage | 2900 | - |
dc.citation.startPage | 2894 | - |
dc.citation.title | ELECTROCHIMICA ACTA | - |
dc.citation.volume | 55 | - |
dc.citation.number | 8 | - |
dc.contributor.affiliatedAuthor | Chae, Oh B. | - |
dc.type.docType | Article | - |
dc.subject.keywordAuthor | Lithium-ion batteries | - |
dc.subject.keywordAuthor | Pechini method | - |
dc.subject.keywordAuthor | Germanium (Ge) electrodes | - |
dc.subject.keywordAuthor | Copper germanide (Cu3Ge) | - |
dc.subject.keywordAuthor | Nano-composites | - |
dc.subject.keywordAuthor | Electrochemical dilatometry | - |
dc.subject.keywordPlus | COMPOSITE ANODE | - |
dc.subject.keywordPlus | GERMANIUM | - |
dc.subject.keywordPlus | NANOCRYSTALLINE | - |
dc.subject.keywordPlus | CAPACITY | - |
dc.subject.keywordPlus | ELECTRODES | - |
dc.subject.keywordPlus | PARTICLES | - |
dc.subject.keywordPlus | SILICON | - |
dc.subject.keywordPlus | POWDER | - |
dc.subject.keywordPlus | LI | - |
dc.subject.keywordPlus | GE | - |
dc.relation.journalResearchArea | Electrochemistry | - |
dc.relation.journalWebOfScienceCategory | Electrochemistry | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
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