DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | Pyun, Su-Il | - |
dc.contributor.advisor | 변수일 | - |
dc.contributor.author | Choi, Young-Min | - |
dc.contributor.author | 최영민 | - |
dc.date.accessioned | 2011-12-15T01:03:20Z | - |
dc.date.available | 2011-12-15T01:03:20Z | - |
dc.date.issued | 1998 | - |
dc.identifier.uri | http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=133530&flag=dissertation | - |
dc.identifier.uri | http://hdl.handle.net/10203/50201 | - |
dc.description | 학위논문(박사) - 한국과학기술원 : 재료공학과, 1998.2, [ xvii, 207 p. ] | - |
dc.description.abstract | The present work is concerned with the electrochemical lithium intercalation reaction into transition metal oxides $Li_{1-\delta}MO_2$ (M=Ni, Co, Mn). In chapter III, the effects of cation mixing on electrochemical lithium intercalation reaction into porous $Li_{1-\delta}Ni_{1-y}Co_yO_2$ electrodes in 1 M $LiClO_4$ propylene carbonate(PC) solution have been investigated by using electrochemical impedance spectroscopy(EIS) as functions of lithium content (1-$\delta$) and cobalt content y. The electrochemical lithium intercalation behaviour of porous $LiNiO_2$ electrodes prepared by solid-state reaction and sol-gel methods have been examined by using X-ray diffractometry(XRD), galvanostatic intermittent charge-discharge experiment, electrochemical impedance spectroscopy(EIS) and charge-discharge cycling test. The conventional oxide electrode showed a larger capacity loss, a greater instantaneous IR drop during the first intermittent discharge and a smaller chemical diffusivity than the gel-derived electrode. The results have been discussed with respect to the marked cation mixing effect in the former electrode. Furthermore the charge-discharge cycling test of the cell Li/organic electrolyte/gel-derived $LiNiO_2$ electrode exhibited an improved cell performance, the initial specific capacity of 150 Ah/kg and energy density above 500 Wh/kg. In chapter IV, the lithium transport through porous $Li_{1-\delta}CoO_2$ electrode has been studied by using potentiostatic current transient technique. The measured current transients were analysed in terms of the phase boundary movement based upon the concept of the quasi-equilibrium established by the open-circuit potential transient measurement. The scaling of the current and the time was performed with respect to the driving force and transferred charge by using the values of the quasi- equilibrium potential and the corresponding lithium stoichiometry. The scaled current transients consist of three stages and agree satisfac... | eng |
dc.language | eng | - |
dc.publisher | 한국과학기술원 | - |
dc.subject | Transition metal oxide | - |
dc.subject | Intercalation | - |
dc.subject | Battery | - |
dc.subject | Lithium | - |
dc.subject | Electrochemistry | - |
dc.subject | 전기화학 | - |
dc.subject | 전이금속산화물 | - |
dc.subject | 인터칼레이션 | - |
dc.subject | 전지 | - |
dc.subject | 리튬 | - |
dc.title | (An) investigation of the electrochemical lithium intercalation reaction into transition metal oxides $Li_{1-δ}MO_2$ (M=Ni, Co, Mn) | - |
dc.title.alternative | $Li_{1-δ}MO_2$ (M=Ni, Co, Mn) 전이금속 산화물에서의 전기화학적 리튬 Intercalation 반응에 대한 연구 | - |
dc.type | Thesis(Ph.D) | - |
dc.identifier.CNRN | 133530/325007 | - |
dc.description.department | 한국과학기술원 : 재료공학과, | - |
dc.identifier.uid | 000945448 | - |
dc.contributor.localauthor | Choi, Young-Min | - |
dc.contributor.localauthor | 최영민 | - |
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