https://scholars.lib.ntu.edu.tw/handle/123456789/407438
標題: | Preparation and electrochemical properties of layer-structured LiNi1/3Co1/3Mn1/3-yAlyO2 | 作者: | Lin Y.-K. Lu C.-H. |
關鍵字: | Cathode materials;Layered structure;Lithium-ion batteries;Sol-gel | 公開日期: | 2009 | 卷: | 189 | 期: | 1 | 起(迄)頁: | 353-358 | 來源出版物: | Journal of Power Sources | 摘要: | Layer-structured LiNi1/3Co1/3Mn1/3-yAlyO2 has been synthesized via a sol-gel method. The lattice constants of LiNi1/3Co1/3Mn1/3-yAlyO2 decrease with the concentration of aluminum ions. XANES analysis further confirms that the valence of cobalt ion is 3+, and that of Ni is between 2+ and 3+ in LiNi1/3Co1/3Mn1/3-yAlyO2. With doping aluminum ions, the redox centers for the electrochemical reaction change from nickel ions alone to both nickel and cobalt ions. The amounts of de-intercalatable lithium ions are affected by the concentration of aluminum ions; however, the extracting efficiency of lithium ions is improved by doping aluminum ions. Among all the samples, LiNi1/3Co1/3Mn0.23Al0.1O2 exhibits the best capacity retention and the least irreversible capacity. ? 2008 Elsevier B.V. All rights reserved. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/407438 | ISSN: | 03787753 | DOI: | 10.1016/j.jpowsour.2008.08.072 | SDG/關鍵字: | Alumina; Aluminum; Cathodes; Cobalt; Electrochemical properties; Extraction; Gelation; Gels; Lattice constants; Lithium; Lithium alloys; Lithium batteries; Lithium compounds; Manganese; Manganese compounds; Nickel; Nickel alloys; Sol-gel process; Sol-gels; Sols; Aluminum ions; Capacity retentions; Cathode materials; Cobalt ions; Concentration of; Electro-chemical reactions; Irreversible capacities; Layered structure; Lithium ions; Lithium-ion batteries; Nickel ions; Redox centers; Sol-gel; Sol-gel methods; XANES analysis; Ions |
顯示於: | 化學工程學系 |
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