Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 최진호 | - |
dc.contributor.author | 황성주 | - |
dc.date.accessioned | 2017-01-05T02:01:58Z | - |
dc.date.available | 2017-01-05T02:01:58Z | - |
dc.date.issued | 2008 | - |
dc.identifier.issn | 1932-7447 | - |
dc.identifier.other | OAK-4706 | - |
dc.identifier.uri | https://dspace.ewha.ac.kr/handle/2015.oak/233544 | - |
dc.description.abstract | Cr-substituted β-Mn1-xCrxO2 nanowires with nonaggregated morphology have been synthesized by the chemical oxidation of layered LiMn0.9Cr0.1O2 microcrystals under hydrothermal conditions at elevated temperature. According to powder X-ray diffraction analysis, a persulfate treatment at 200 °C gives rise to a unique transformation from a monoclinic-layered structure to a pyrolusite-(β-MnO2-) type structure. Electron microscopic analyses clearly demonstrated that the oxidized derivative consists of well-separated single-crystalline nanowires with a diameter of ∼30 nm and a length of several micrometers. Mn K-edge and Cr K-edge X-ray absorption spectroscopy and chemical analysis provide straightforward evidence for the substitution of chromium ions for the manganese sites of the pyrolusite-structured manganese oxide nanowires. Of special importance is that the present Cr-substituted β-MnO2-type nanowires show promising electrode performance for Li+ ion batteries, superior to those of pristine LiMn0.9Cr0.1O2, bulk β-MnO 2, and other structure-type manganese oxide nanowires including unsubstituted β-MnO2 nanowires. On the basis of the present experimental findings, we are able to conclude that the persulfate treatment under hydrothermal conditions provides a powerful method not only to prepare cation-substituted manganese oxide nanowires but also to improve the electrode performance of microcrystalline metal oxides through nanostructure fabrication. ©2008 American Chemical Society. | - |
dc.language | English | - |
dc.title | Transformation from microcrystalline LiMn1-xCrxO 2 to ID nanostructured β-Mn1-xCrxO 2: Promising electrode performance of β-MnO2-type nanowires | - |
dc.type | Article | - |
dc.relation.issue | 13 | - |
dc.relation.volume | 112 | - |
dc.relation.index | SCIE | - |
dc.relation.index | SCOPUS | - |
dc.relation.startpage | 5160 | - |
dc.relation.lastpage | 5164 | - |
dc.relation.journaltitle | Journal of Physical Chemistry C | - |
dc.identifier.doi | 10.1021/jp710579y | - |
dc.identifier.wosid | WOS:000254541000053 | - |
dc.identifier.scopusid | 2-s2.0-47149100514 | - |
dc.author.google | Park D.H. | - |
dc.author.google | Ha H.-W. | - |
dc.author.google | Lee S.H. | - |
dc.author.google | Choy J.-H. | - |
dc.author.google | Hwang S.-J. | - |
dc.contributor.scopusid | 최진호(8044393000) | - |
dc.contributor.scopusid | 황성주(7404626171) | - |
dc.date.modifydate | 20190901081003 | - |