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عنوان
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MnO2 nanoparticles decorated on electrophoretically deposited graphene nanosheets for high performance supercapacitor
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نوع پژوهش
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مقاله چاپ شده
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کلیدواژهها
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Two-step potential method, MnO2 nanoparticles, Electrophoretic, Graphene, Supercapacitor
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چکیده
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Composite of manganese dioxide and electrochemically reduced graphene oxide (MnO2/ERGO) was prepared and investigated as active material in supercapacitor. In order to synthesize the nanocomposite, a thin film of graphene oxide (GO) was formed by electrophoretic deposition (EPD) technique from an aqueous dispersion of GO on stainless steel (SS). GO/SS was electrochemically reduced to form ERGO. Two-step potential method was used to deposit MnO2 on ERGO/SS. MnO2 nanoparticles with dimensions in the range of 40e70 nm were formed as a uniform coating on ERGO/SS. Specific capacitance of MnO2/ ERGO/SS is 392 F g1 at current density of 1 A g1 in 0.5 M Na2SO4, which was higher than 159 F g1 for ERGO/SS. Also, MnO2/ERGO/SS shows higher power and energy densities than ERGO/SS. Due to unique structure of prepared MnO2/ERGO nanocomposite, the capacitive behavior of ERGO is improved.
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پژوهشگران
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مجید جعفری (نفر سوم)، رحمان حسین زاده (نفر دوم)، شهرام قاسمی میر (نفر اول)
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