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National Chung Hsing University Institutional Repository - NCHUIR > 工學院 > 材料科學與工程學系 > 依資料類型分類 > 期刊論文 >  Characterization of electrolytic Co3O4 thin films as anodes for lithium-ion batteries

Please use this identifier to cite or link to this item: http://nchuir.lib.nchu.edu.tw/handle/309270000/132207

標題: Characterization of electrolytic Co3O4 thin films as anodes for lithium-ion batteries
作者: Liu, H.C.;Yen, S.K.
顏秀崗
關鍵字: electrolytic deposition;nano-sized Co3O4;thin film;Raman spectroscopy;metal-oxides;electrochemical reaction;transition;raman;coo
日期: 2007
Issue Date: 2012-12-07 16:45:41 (UTC+8)
關連: Journal of Power Sources, Volume 166, Issue 2, Page(s) 478-484.
摘要: The electrolytic deposition of Co3O4 thin films on stainless steel was conducted in Co(NO3)(2) aqueous solution for anodes in lithium-ion thin film batteries. Three major electrochemical reactions during the deposition were discussed. The coated specimens and the coating films carried out at -1.0 V (saturated KCl Ag/AgCl) were subjected to annealing treatments and further characterized by XRD, TGA/DTA, FE-SEM, Raman spectroscopy, cyclic voltammetry (CV) and discharge/charge cyclic tests. The as-coated film was beta-Co(OH)(2), condensed into CoO and subsequently oxidized into nano-sized Co3O4 particles. The nano-sized Co3O4, CoO, Li2O and Co particles revealed their own characteristics different from micro-sized ones, such as more interfacial effects on chemical bonding and crystallinity. The initial maximum capacity Of Co3O4 coated specimen was 1930 mAh g(-1) which much more than its theoretical value 890 mAh g(-1), since the nano-sized particles offered more interfacial bondings for extra sites of Li+ insertion. However, a large ratio of them was trapped, resulting in a great part of irreversible capacity during the first charging. Still, it revealed a capacity 500 mAh g(-1) after 50 discharged-charged cycles. (c) 2007 Elsevier B.V. All rights reserved.
Relation: Journal of Power Sources
Appears in Collections:[依資料類型分類] 期刊論文
[依教師分類] 顏秀崗
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