Full metadata record
DC Field | Value | Language |
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dc.contributor.author | 황성주 | - |
dc.date.accessioned | 2016-08-28T12:08:23Z | - |
dc.date.available | 2016-08-28T12:08:23Z | - |
dc.date.issued | 2009 | - |
dc.identifier.issn | 1932-7447 | - |
dc.identifier.other | OAK-5930 | - |
dc.identifier.uri | https://dspace.ewha.ac.kr/handle/2015.oak/220262 | - |
dc.description.abstract | The porous hierarchical assembly of lithium-rich Li1+xMnO 3-δ 2D nanoplates as well as isolated 0D nanocrystalline homologues has been synthesized via lithiation reactions of nanostructured manganese oxides under hydrothermal conditions. According to powder X-ray diffraction and electron microscopy, a hydrothermal LiOH treatment for nanostructured δ-MnO2 precursor produces a lithium-rich Li 1+xMnO3-δ phase with the nanoworm-like hierarchically assembled 2D nanoplate morphology. After the lithiation reaction under identical conditions, the 1D nanowires of the α-MnO2 precursor are transformed into the 0D nanoparticles of the Li 1+xMnO3-δ phase. The Mn K-edge X-ray absorption spectroscopic analysis for the lithiated materials clearly demonstrated that tetravalent manganese ions are stabilized in octahedral sites of a Li 2MnO3-type layered structure composed of edge-shared MnO6/LiO6 octahedra. From electrochemical measurements, it was found that the lithiated Li1+xMnO3-δ nanostructured materials show much superior electrode performance over the precursor manganese oxides and bulk lithium-rich manganate. The powder X-ray diffraction analyses for the electrochemically cycled derivatives clearly demonstrated that the improvement of electrode performance after lithiation can be attributed to the phase transformation to the Li-rich Li 1+xMnO3-δ phase with high structural stability. On the basis of the present experimental findings, we are able to conclude that the present phase transformation route provides a new method not only to synthesize nanostructured lithium-rich manganese oxides with controllable dimensionality and morphology but also to improve the electrode performance of nanostructured manganese oxides. © 2009 American Chemical Society. | - |
dc.language | English | - |
dc.title | Hierarchically assembled 2D nanoplates and 0d nanoparticles of lithium-rich layered lithium manganates applicable to lithium ion batteries | - |
dc.type | Article | - |
dc.relation.issue | 40 | - |
dc.relation.volume | 113 | - |
dc.relation.index | SCIE | - |
dc.relation.index | SCOPUS | - |
dc.relation.startpage | 17392 | - |
dc.relation.lastpage | 17398 | - |
dc.relation.journaltitle | Journal of Physical Chemistry C | - |
dc.identifier.doi | 10.1021/jp904072r | - |
dc.identifier.wosid | WOS:000270362100019 | - |
dc.identifier.scopusid | 2-s2.0-70350028411 | - |
dc.author.google | Baek J.Y. | - |
dc.author.google | Ha H.-W. | - |
dc.author.google | Kim I.-Y. | - |
dc.author.google | Hwang S.-J. | - |
dc.contributor.scopusid | 황성주(7404626171) | - |
dc.date.modifydate | 20190901081003 | - |