DC Field | Value | Language |
---|---|---|
dc.contributor.author | Lee, SM | ko |
dc.contributor.author | Kim, SH | ko |
dc.contributor.author | Lee, Jai Young | ko |
dc.date.accessioned | 2013-03-03T17:13:07Z | - |
dc.date.available | 2013-03-03T17:13:07Z | - |
dc.date.created | 2012-02-06 | - |
dc.date.created | 2012-02-06 | - |
dc.date.issued | 2002-01 | - |
dc.identifier.citation | JOURNAL OF ALLOYS AND COMPOUNDS, v.330, pp.796 - 801 | - |
dc.identifier.issn | 0925-8388 | - |
dc.identifier.uri | http://hdl.handle.net/10203/79628 | - |
dc.description.abstract | In order to improve the kinetic properties of the Zr-based hydrogen storage alloy electrode, the ball-milling process is applied to the Zr-based alloy using the Ti-based alloy powder as a surface modifier. While the Zr-based alloy electrode is not fully activated before 50 cycles, the ball-milled Zr-based alloy electrode using Ti-based alloy as a surface modifier is fully activated within only four cycles. In order to analyze the strikingly improved kinetic characteristics after ball-milling, the microstructure of ball-milled alloy is examined by transmission (TEM), scanning electron microscopy (SEM), and energy dispersive spectroscopy (EDS). It is observed that there is a surface-alloying region at the contact points between the two alloy powders from the TEM bright-field image, Furthermore, the local quantitative analysis by EDS clearly reveals that the atomic concentration of the constituting elements in the surface-alloying region is a gradually changed between the two alloy powders. From the above results, it is suggested that the high kinetic energy applied in the ball-milling process causes cold-welding or surface alloying at the points of impact where Zr-based alloy particles collide with Ti-based alloy particles by the action of steel balls at high speed. The SEM analysis demonstrates that the particle size is decreased as the ball-milling time increases, which implies an increase in the surface area of Zr-based alloy particles touching Ti-based alloy particles. Eventually, it can be suggested that Ti-alloy powder serves as a window for hydrogen to penetrate into the Zr-based alloy, which leads to easy absorption/desorption of hydrogen and also to improvement in the kinetic properties of the Zr-based alloy electrode at initial cycles. (C) 2002 Elsevier Science B.V. All rights reserved. | - |
dc.language | English | - |
dc.publisher | ELSEVIER SCIENCE SA | - |
dc.subject | ACTIVATION BEHAVIOR | - |
dc.subject | ELECTROCHEMICAL PROPERTIES | - |
dc.subject | HYDRIDE ELECTRODES | - |
dc.title | A study on the electrode characteristics of Zr-based alloy surface-modified with Ti-based alloy by ball-milling process as an anode material for Ni-MH rechargeable batteries | - |
dc.type | Article | - |
dc.identifier.wosid | 000173087800159 | - |
dc.type.rims | ART | - |
dc.citation.volume | 330 | - |
dc.citation.beginningpage | 796 | - |
dc.citation.endingpage | 801 | - |
dc.citation.publicationname | JOURNAL OF ALLOYS AND COMPOUNDS | - |
dc.identifier.doi | 10.1016/S0925-8388(01)01591-2 | - |
dc.contributor.nonIdAuthor | Lee, SM | - |
dc.contributor.nonIdAuthor | Kim, SH | - |
dc.type.journalArticle | Article; Proceedings Paper | - |
dc.subject.keywordAuthor | ball-milling process | - |
dc.subject.keywordAuthor | activation characteristics | - |
dc.subject.keywordAuthor | rate-capability | - |
dc.subject.keywordAuthor | Ti-based hydrogen storage alloy | - |
dc.subject.keywordAuthor | electrocatalytic activity | - |
dc.subject.keywordAuthor | dense oxide film | - |
dc.subject.keywordPlus | ACTIVATION BEHAVIOR | - |
dc.subject.keywordPlus | ELECTROCHEMICAL PROPERTIES | - |
dc.subject.keywordPlus | HYDRIDE ELECTRODES | - |
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