High-performance carbon-coated ZnMn2O4 nanocrystallite supercapacitors with tailored microstructures enabled by a novel solution combustion method
In: Journal of Power Sources, Jg. 378 (2018-02-01), S. 90-97
Online
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Zugriff:
Although ZnMn 2 O 4 is widely studied as Li-ion battery anodes, it remains a challenge to tailor suitable microstructures of the oxide for supercapacitor applications. Carbon-coated ZnMn 2 O 4 (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 Na 2 SO 4(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.
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High-performance carbon-coated ZnMn2O4 nanocrystallite supercapacitors with tailored microstructures enabled by a novel solution combustion method
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Autor/in / Beteiligte Person: | Liao, Yen-Fa ; Huang, Sheng-Siang ; Abdollahifar, Mozaffar ; Lin, Yan-Cheng ; Lin, Yu-Hsiang ; Sheu, Hwo-Shuenn ; Shih, Bing-Yi ; Wu, Nae-Lih |
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Zeitschrift: | Journal of Power Sources, Jg. 378 (2018-02-01), S. 90-97 |
Veröffentlichung: | Elsevier BV, 2018 |
Medientyp: | unknown |
ISSN: | 0378-7753 (print) |
DOI: | 10.1016/j.jpowsour.2017.12.022 |
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