Full metadata record
DC Field | Value | Language |
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dc.contributor.author | 최진호 | - |
dc.contributor.author | 황성주 | - |
dc.date.accessioned | 2017-02-15T08:02:34Z | - |
dc.date.available | 2017-02-15T08:02:34Z | - |
dc.date.issued | 2006 | - |
dc.identifier.issn | 0378-7753 | - |
dc.identifier.other | OAK-3580 | - |
dc.identifier.uri | https://dspace.ewha.ac.kr/handle/2015.oak/234124 | - |
dc.description.abstract | A relationship between the chemical bonding nature of LiMn2-xNixO4 and the Ni content has been systematically investigated. According to X-ray diffraction analysis, nickel-substituted lithium manganates crystallize with a cubic spinel structure without the formation of any impurity phase such as NiO in the present substitution range of 0 ≤ x ≤ 0.4. Micro-Raman analysis showed that Ni substitution gave rise to an increase in the intensities and energies of the two main phonon lines at ∼580 and ∼620 cm-1, indicating enhancement of the average Mn oxidation states and reinforcement of the Mn{single bond}O bonds. This was confirmed by Mn K-edge X-ray absorption spectroscopic (XAS) analysis. Also, a new phonon line appeared at ∼495 cm-1 after the Ni substitution, which can be assigned as an Ni-O vibration mode rather than as a T2g(2) mode of LiMn2O4. Ni K-edge XAS and micro-Raman analyses clearly demonstrate that divalent nickel ions existed in the octahedral sites of the cubic spinel lattice without a significant change in the chemical environment with the Ni content. In this regard, the poor electrochemical performance of heavily Ni-substituted compounds for the 3 V region is not attributable to the variation in the local environment of Ni ions with the Ni content, but to the low structural stability of the substituted NiO6 octahedra. © 2006 Elsevier B.V. All rights reserved. | - |
dc.language | English | - |
dc.title | Influence of nickel content on the chemical bonding character of LiMn2-xNixO4 spinel oxides | - |
dc.type | Article | - |
dc.relation.issue | 2 | - |
dc.relation.volume | 159 | - |
dc.relation.index | SCIE | - |
dc.relation.index | SCOPUS | - |
dc.relation.startpage | 1346 | - |
dc.relation.lastpage | 1352 | - |
dc.relation.journaltitle | Journal of Power Sources | - |
dc.identifier.doi | 10.1016/j.jpowsour.2005.12.018 | - |
dc.identifier.wosid | WOS:000240959500070 | - |
dc.identifier.scopusid | 2-s2.0-33748035404 | - |
dc.author.google | Park D.H. | - |
dc.author.google | Lim S.T. | - |
dc.author.google | Hwang S.-J. | - |
dc.author.google | Choy J.-H. | - |
dc.author.google | Choi J.H. | - |
dc.author.google | Choo J. | - |
dc.contributor.scopusid | 최진호(8044393000) | - |
dc.contributor.scopusid | 황성주(7404626171) | - |
dc.date.modifydate | 20190901081003 | - |