|کد مقاله||کد نشریه||سال انتشار||مقاله انگلیسی||ترجمه فارسی||نسخه تمام متن|
|178698||459314||2016||5 صفحه PDF||سفارش دهید||دانلود رایگان|
• Development and performance of a symmetric micro-supercapacitor made of diamond-coated SiNWs using a protic ionic liquid
• The device delivers a specific capacitance of 1.5 mF cm− 2 and a power density of 25 mW cm− 2 at a large cell voltage of 4 V.
• The lifetime of the device exhibits remarkable electrochemical stability after 1 · 106 cycles.
Silicon nanowires (SiNWs) were successfully coated by uniform, adherent and homogenous ultra-thin crystalline diamond films through microwave enhanced chemical vapor deposition (MWCVD). The as-grown functionalized nanowires were employed as electrodes in a symmetric micro-supercapacitor (MSC) using a protic ionic liquid electrolyte [triethylammonium bis(trifluoromethylsulfonyl)imide; Et3NH TFSI]. The electrochemical performance of the device delivered a specific capacitance of 1.5 mF cm− 2 and a power density of 25 mW cm− 2 using an enlarged cell voltage of 4 V. Furthermore, a remarkable cycling stability was evaluated after 1 · 106 galvanostatic cycles at a high current density of 10 mA cm− 2 with an excellent capacitive behavior. These results confirm that diamond-coated SiNW micro-supercapacitors exhibit very promising performances dealing with MSCs based on CVD-grown SiNWs.
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Journal: Electrochemistry Communications - Volume 63, February 2016, Pages 34–38