https://scholars.lib.ntu.edu.tw/handle/123456789/408869
標題: | Graphene-Wrapped Nanoporous Nickel-Cobalt Oxide Flakes for Electrochemical Supercapacitors | 作者: | Azhar A. Zakaria M.B. Lin J. Chikyow T. Martin D.J. Alghamdi Y.G. Alshehri A.A. Bando Y. Hossain M.S.A. Wu K.C.W. Kumar N.A. Yamauchi Y. |
關鍵字: | graphene;hybridization;mixed metal oxides;nanoporous materials;supercapacitors | 公開日期: | 2018 | 卷: | 3 | 期: | 29 | 起(迄)頁: | 8505-8510 | 來源出版物: | ChemistrySelect | 摘要: | A novel approach for hybridizing nanoporous NiCo oxide flakes with graphene sheets is reported. Positively charged cyano-bridged CoNi coordination polymer flakes (CoNi-CP) are mixed with graphene (G) suspension with negatively charged surface. Due to effective electrostatic interaction, both the materials are hybridized to form CoNi-CP/G composite. The as-prepared CoNi-CP/G composite is thermally treated in air, to remove the organic components without affecting the integrity of the parent G sheets. Through the thermal treatment, the CoNi-CP flakes wrapped into G sheets are converted to NiCo oxide, resulting in a new composite consisting of NiCo oxide flakes and G sheets. The NiCo-oxide/G composite shows the high specific capacitance (? 199 F g-1) at 5 mV/s, and features the good capacitance retention of ?68% at 100 mV(? 135 F g ?1 ). ? 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/408869 | ISSN: | 23656549 | DOI: | 10.1002/slct.201801174 |
顯示於: | 化學工程學系 |
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