There are no files associated with this item.
Full metadata record
DC Field | Value | Language |
---|---|---|
dc.citation.endPage | 9260 | - |
dc.citation.number | 36 | - |
dc.citation.startPage | 9252 | - |
dc.citation.title | JOURNAL OF PHYSICAL CHEMISTRY B | - |
dc.citation.volume | 106 | - |
dc.contributor.author | Choi, Hyun Chul | - |
dc.contributor.author | Lee, Sang Yun | - |
dc.contributor.author | Kim, SSeung Bin | - |
dc.contributor.author | Kim, Min Gyu | - |
dc.contributor.author | Lee, Min Kyu | - |
dc.contributor.author | Shin, Hyun Joon | - |
dc.contributor.author | Lee, Jae Sung | - |
dc.date.accessioned | 2023-12-22T11:37:02Z | - |
dc.date.available | 2023-12-22T11:37:02Z | - |
dc.date.created | 2015-07-27 | - |
dc.date.issued | 2002-09 | - |
dc.description.abstract | Cobalt oxide is known to exhibit a large capacity as a negative electrode in lithium-ion batteries. Here, Co K-edge X-ray absorption spectroscopy (XAS) was used to investigate variations in the local structure during the first electrochemical cycle of the insertion-extraction of lithium into CoO. The XANES and EXAFS spectra in LiyCoO (y: lithium content) varied markedly with the lithium content. The initial insertion of lithium leads to the reduction of Co2+ in the pristine CoO to the reduced metallic Co-0 state. The systematic variations observed in intensities of the peaks corresponding to the 1s --> 3d and 1s --> 4p transitions indicate that the mole ratio of Co to Co-0 increases gradually with the electrochemical insertion of lithium ions. Insertion of lithium causes the local structure around the Co atoms to become asymmetric. The systematic decrease in the magnitude of the Fourier transform (FT) with increasing amount of inserted lithium is closely related to an increase in static disorder due to the presence of two phases: Co-0 clusters and CoO. The small-sized Co particles evolve gradually with a well-separated distribution in the Li2O matrix. In the successive extraction of lithium, the reduced Co particles return reversibly to the high-temperature cubic phase of CoO | - |
dc.identifier.bibliographicCitation | JOURNAL OF PHYSICAL CHEMISTRY B, v.106, no.36, pp.9252 - 9260 | - |
dc.identifier.doi | 10.1021/jp0205968 | - |
dc.identifier.issn | 1520-6106 | - |
dc.identifier.scopusid | 2-s2.0-0037068892 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/12664 | - |
dc.identifier.url | http://pubs.acs.org/doi/abs/10.1021/jp0205968 | - |
dc.identifier.wosid | 000177876900011 | - |
dc.language | 영어 | - |
dc.publisher | AMER CHEMICAL SOC | - |
dc.title.alternative | Local structural characterization for electrochemical insertion-extraction of lithium into CoO with X-ray absorption spectroscopy | - |
dc.title | Local structural characterization for electrochemical insertion-extraction of lithium into CoO with X-ray absorption spectroscopy | - |
dc.type | Article | - |
dc.description.journalRegisteredClass | scopus | - |
Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Tel : 052-217-1404 / Email : scholarworks@unist.ac.kr
Copyright (c) 2023 by UNIST LIBRARY. All rights reserved.
ScholarWorks@UNIST was established as an OAK Project for the National Library of Korea.