https://scholars.lib.ntu.edu.tw/handle/123456789/409030
標題: | High-performance carbon-coated ZnMn2O4 nanocrystallite supercapacitors with tailored microstructures enabled by a novel solution combustion method | 作者: | Abdollahifar M. Huang S.-S. Lin Y.-H. Lin Y.-C. Shih B.-Y. Sheu H.-S. Liao Y.-F. Wu N.-L. |
關鍵字: | Neutral electrolyte;Pseudocapacitor;Solution combustion;Spinel;ZnMn2O4 nanocrystallite | 公開日期: | 2018 | 卷: | 378 | 起(迄)頁: | 90-97 | 來源出版物: | Journal of Power Sources | 摘要: | Although ZnMn2O4 is widely studied as Li-ion battery anodes, it remains a challenge to tailor suitable microstructures of the oxide for supercapacitor applications. Carbon-coated ZnMn2O4 (C@ZMO) nanocrystallites showing high-performance pseudocapacitor behaviours in neutral aqueous electrolyte are for the first time successfully synthesised via a novel solution combustion process using polyethylene glycol as a multifunctional microstructure-directing agent. Controlling the molecular weight and amount of the polymer in the combustion solution enables the formation of highly-crystalline C@ZMO having substantially higher, by more than 5 folds, specific surface areas with mesoporous structures and conformal carbon coating via the one-pot synthesis process. The resulting C@ZMO supercapacitor electrodes in Na2SO4(aq) electrolyte exhibit ideal capacitive behaviours with specific capacitances up to 150 F g?1 and cycle stability showing no capacitance fade after 10,000 cycles at 60% of full capacity and >99% Coulombic efficiency. This study not only illustrates a new powerful synthesis route capable of producing conductive mesoporous crystalline oxide-based nanomaterials for energy storage applications but also reveals a new class of high-performance pseudocapacitive materials for neutral aqueous electrolytes. ? 2017 |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/409030 | ISSN: | 03787753 | DOI: | 10.1016/j.jpowsour.2017.12.022 | SDG/關鍵字: | Capacitance; Carbon; Combustion; Electrodes; Electrolytes; Lithium compounds; Lithium-ion batteries; Mesoporous materials; Microstructure; Nanocrystalline materials; Nanocrystallites; Nanocrystals; Sodium sulfate; Supercapacitor; Zinc compounds; Energy storage applications; Neutral electrolytes; Pseudo-capacitive materials; Solution combustion; Solution combustion process; Spinel; Supercapacitor application; ZnMn2O4; Manganese compounds |
顯示於: | 化學工程學系 |
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