dc.citation.endPage |
365 |
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dc.citation.number |
8 |
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dc.citation.startPage |
362 |
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dc.citation.title |
ELECTROCHEMICAL AND SOLID STATE LETTERS |
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dc.citation.volume |
3 |
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dc.contributor.author |
Cho, Jaephil |
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dc.contributor.author |
Kim, CS |
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dc.contributor.author |
Yoo, SI |
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dc.date.accessioned |
2023-12-22T12:07:12Z |
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dc.date.available |
2023-12-22T12:07:12Z |
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dc.date.created |
2014-07-21 |
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dc.date.issued |
2000-08 |
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dc.description.abstract |
We report that sol-gel coating of SnO2 and subsequent heat-treatment at relatively low temperature greatly improve the structural stability of LiCoO2 cathodes. Coated LiCoO2 materials heat-treated at 400 and 500 degrees C exhibit excellent structural stability, retaining 86 and 84%, respectively, of their initial capacities after 47 cycles between 4.4 and 2.75 V at the 0.5 C rate. This is attributed to the disappearance of the transition to a hexagonal phase from a monoclinic phase at 4.15-4.2 V during cycling, a result of the formation of nonuniform Sn distribution throughout the particle, i.e., higher Sn concentration near the particle surface. In contrast, coated LiCoO2 heat-treated at 600 degrees C that shows uniform Sn distribution throughout the particles exhibits this phase transition during cycling, as does uncoated LiCoO2, leading to 51% capacity loss after 47 cycles. This phase transition also increases cation disorder upon cycling. |
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dc.identifier.bibliographicCitation |
ELECTROCHEMICAL AND SOLID STATE LETTERS, v.3, no.8, pp.362 - 365 |
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dc.identifier.doi |
10.1149/1.1391149 |
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dc.identifier.issn |
1099-0062 |
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dc.identifier.scopusid |
2-s2.0-0342918692 |
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dc.identifier.uri |
https://scholarworks.unist.ac.kr/handle/201301/5226 |
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dc.identifier.url |
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0342918692 |
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dc.identifier.wosid |
000087748000003 |
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dc.language |
영어 |
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dc.publisher |
ELECTROCHEMICAL SOC INC |
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dc.title |
Improvement of structural stability of LiCoO2 cathode during electrochemical cycling by sol-gel coating of SnO2 |
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dc.type |
Article |
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dc.description.journalRegisteredClass |
scopus |
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