https://scholars.lib.ntu.edu.tw/handle/123456789/445650
標題: | Characterization of a new type of asymmetric supercapacitors: LiMn <inf>2</inf>O<inf>4</inf>/MnFe<inf>2</inf>O<inf>4</inf> | 作者: | Wu, N.-L. Chen, Y.-H. NAE-LIH WU |
公開日期: | 2008 | 卷: | 16 | 期: | 1 | 起(迄)頁: | 223-228 | 來源出版物: | ECS Transactions | 摘要: | Nanocrystalline MnFe2O4 having a spinel structure with Mn and Fe ions randomly distributed over the tetrahedral and octahedral sites have been found to exhibit capacitive characteristics in organic electrolyte containing 1M LiPF6 in the mixture of ethyl carbonate + ethylene methyl carbonate. As characterized by cyclic voltammetry and in-situ synchrotron X-ray absorption spectroscopy, the material show reversible pseudocapacitance behavior over a potential window from 1.75V to 4.5 V versus Li/Li+ with a specific capacitance of ̃125 F/g. Asymmetric supercapacitors consisting of LiMn2O4 cathode and MnFe2O4 anode and Li organic electrolyte has thus been developed and characterized for their electrochemical performance in a three-electrode configuration in order to independently reveal the behaviors of the battery cathode and pseudocapacitive anode. © The Electrochemical Society. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/445650 | DOI: | 10.1149/1.2985647 | SDG/關鍵字: | Anodes; Cathodes; Cyclic voltammetry; Electrolytes; Ethylene; Lithium metallography; Lithium-ion batteries; Nanocrystalline materials; Nanocrystals; Phosphorus compounds; Supercapacitor; X ray absorption spectroscopy; Asymmetric supercapacitor; Capacitive characteristics; Electrochemical performance; In-situ synchrotrons; Organic electrolyte; Pseudocapacitance; Randomly distributed; Specific capacitance; Fluorine compounds |
顯示於: | 化學工程學系 |
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