نانومقیاس

نانومقیاس

ساخت الکترود چندسازه براساس گرافن/آهن-مس برای کاربرد در دستگاه های ذخیره ساز انرژی الکتریکی

نوع مقاله : مقاله پژوهشی

نویسندگان
دانشگاه شهید بهشتی، دانشکده فیزیک
چکیده
در این مقاله، الکترودی برای ابرخازن با استفاده از گرافن متورق شده و آلاییده شده با فلزات مغناطیسی و مشتقات اکسیدی آن‌‌ها ساخته شد. ماده‌ی سنتز شده به عنوان ماده‌ی فعال ذخیره­ساز انرژی الکتریکی بر روی زیرلایه‌ی فوم نیکل قرار گرفت و خواص الکتروشیمیایی آن مورد بررسی قرار گرفت. ساختار و ترکیب­های موجود در نمونه‌‌‌های سنتز شده با طیف‌سنجی پراش پرتوی ایکس (XRD)، پرتوی ایکس انرژی تفکیک شده (EDS) و طیف­سنجی رامان مطالعه شد. همچنین برای شناسایی مورفولوژی نمونه‌‌‌ها از میکروسکوپ الکترونی روبشی (SEM)، میکروسکوپ الکترونی عبوری (TEM و HRTEM) بهره گرفته شد. مطالعات ولتامتری چرخه‌ای و شارژ-دشارژ نشان دادند که رفتار ماده‌ی سنتز شده باتری­گونه است. براساس نتایج حاصل از ظرفیت ویژه در سرعت‌‌‌‌های روبش mV/s 5، 10، 20، 30، 40، 50 و 70 در الکترولیت 1 مولار KOH، بالاترین ظرفیت مربوط به سرعت روبش mV/s 5 است که ظرفیت در آن برابر با F/g 63/1124 است.
کلیدواژه‌ها

عنوان مقاله English

Fabrication of composite electrode based on graphene / iron / copper for use in electrical energy storage devices

نویسندگان English

Moojan Zahiri Rad
Seyed Majid Mohseni
Saadat Mokhtari
Zahra Sheykhifard
Department of physics, Shahid Beheshti university
چکیده English

In this paper, Graphene was exfoliated and doped simultaneously with magnetic metals and their oxide derivatives based on electrochemical method. The electrochemical properties of the as-prepared samples are investigated as advanced electrode materials for supercapacitors which was coated on nickel foam substrate. The structure and composition of the synthesized samples were studied by X-ray diffraction (XRD), Energy-dispersive X-ray spectroscopy (EDS) and Raman spectroscopy. The morphologies were characterized by field emission scanning electron microscopy (FESEM), Transmission electron microscopy (TEM) and High-resolution transmission electron microscopy (HRTEM). Cyclic voltammetry and galvanostatic charge-discharge measurments have shown that the behavior of the synthesized material is battery-like. According to the results of the specific capacity at different scan rates of 5, 10, 20, 30, 40, 50 and 70 mV/s in 1 M KOH, the highest capacity related to the scan rate of 5 mV/s, which has a capacity equal to 1124.63 F/g.

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دوره 8، شماره 2
تابستان 1400
صفحه 1-10

  • تاریخ دریافت 21 دی 1399
  • تاریخ بازنگری 21 فروردین 1400
  • تاریخ پذیرش 26 بهمن 1399