DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | Kwon, Hyuk-Sang | - |
dc.contributor.advisor | 권혁상 | - |
dc.contributor.author | Park, Jung-Won | - |
dc.contributor.author | 박정원 | - |
dc.date.accessioned | 2011-12-15 | - |
dc.date.available | 2011-12-15 | - |
dc.date.issued | 2006 | - |
dc.identifier.uri | http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=254284&flag=dissertation | - |
dc.identifier.uri | http://hdl.handle.net/10203/49635 | - |
dc.description | 학위논문(박사) - 한국과학기술원 : 신소재공학과, 2006.2, [ [xii], 164 p. ] | - |
dc.description.abstract | The preparation of Sn-based anodes for Li-ion batteries is a viable, advantageous process, for the following reasons; First, the electroplating process is simpler than currently-used powder process because there is no need for any binder or conductive agents. Second, owing to their low impurity, a comparatively high initial coulombic efficiency can be obtained. However, a Sn anode has the intrinsic problem of crumbling due to the large amount of volume expansion (up to 300 %) during Li insertion, resulting in the electrical isolation of the Sn anode from the Cu substrate with a significant decrease in the charge/discharge capacity of cell. In order to overcome the problem, the possibility of using a nodule-type Cu substrate was explored by comparison with a smooth and a pyramid-type Cu substrate, and its proper aging condition was proposed. Comparing the cycle performance of the Sn electrodes electro-plated on the three different Cu substrates, the Sn electrode electroplated on the nodule-type showed the highest reversible capacity $(700 mAh/g (1^{st} cycle)$, $450 mAh/g (2^{nd} cycle)$, and $377 mAh/g (20^{th} cycle)$, which demonstrates that the nodule-type Cu substrate enhanced the adhesion and electrical contact properties between the Sn and the Cu substrate. In addition, Sn an-ode electroplated and aged for 1 h at 200℃ exhibited a high reversible capacity and cycle performance, which is due to the enhanced adhesion strength by formation of the thin $Cu_3$ Sn phase. However, when aged for longer than 1 h at 200 ℃, the reversible capacity decreased due to the thickening of the inactive $Cu_3$ Sn phase. The best performance of the Sn anode was obtained when the Sn anode was electroplated on the nodule-type Cu substrate and aged for 1 h at 200 ℃, which exhibited high reversible capacity (~600 mAh/g) and good cycleability. Recently, a strange phenomenon named as ‘high-voltage irreversible capacity’ was reported. This occurs during lithiation process of a Sn... | eng |
dc.language | eng | - |
dc.publisher | 한국과학기술원 | - |
dc.subject | Electrodeposition | - |
dc.subject | Anode | - |
dc.subject | High-voltage irreversible capacity | - |
dc.subject | 리튬이온전지 | - |
dc.subject | Li-ion battery | - |
dc.subject | 전해도금 | - |
dc.subject | 음극 | - |
dc.subject | 고전압비가역용량 | - |
dc.subject | Sn | - |
dc.subject | 주석 | - |
dc.title | (A) study on the electrochemical properties of sn-based anodes fabricated by electrodeposition for li-ion batteries | - |
dc.title.alternative | 전해도금법으로 제조된 리튬 이온 이차전지용 Sn 계 음극의 전기화학적 특성 | - |
dc.type | Thesis(Ph.D) | - |
dc.identifier.CNRN | 254284/325007 | - |
dc.description.department | 한국과학기술원 : 신소재공학과, | - |
dc.identifier.uid | 020025124 | - |
dc.contributor.localauthor | Park, Jung-Won | - |
dc.contributor.localauthor | 박정원 | - |
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