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electrodeposited ni(oh)2 nanostructures on electro-etched carbon fiber paper for highly stable supercapacitors
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نویسنده
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kazemi sayed habib ,malae keyvan
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منبع
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journal of the iranian chemical society - 2017 - دوره : 14 - شماره : 2 - صفحه:419 -425
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چکیده
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Herein, we introduce a facile, inexpensive and fast, and additive-/template-free method to fabricate highly stable nickel hydroxide nanofibers for supercapacitor applications. ni(oh)2 nanofibers were electrodeposited on electro-etched carbon fiber paper by a potential step method (ni(oh)2-ecfs) and characterized using scanning electron microscopy and x-ray diffraction analysis. electrochemical performance of ni(oh)2-ecf was studied in symmetric two-electrode assembly by cyclic voltammetry, galvanostatic charge–discharge method, and electrochemical impedance spectroscopy. a specific capacitance of 277.5 f g−1 was achieved for the symmetric supercapacitor based on two identical ni(oh)2-ecfs. our findings demonstrate high-rate capability with excellent stability (approximately 100 % capacitance retention) for ni(oh)2-ecf supercapacitor, originated from the intimate contact between ni(oh)2 and ecf. our studies suggest the ni(oh)2-ecf electrode as an excellent material for supercapacitor applications.
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کلیدواژه
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energy storage ,impedance spectroscopy ,nanostructures ,oxide
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آدرس
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institute for advanced studies in basic sciences (iasbs), center for research in climate change and global warming (crcc), department of chemistry, iran, institute for advanced studies in basic sciences (iasbs), department of chemistry, iran
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Authors
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