کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6687376 501880 2015 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Electrochemical investigation of thermically treated graphene oxides as electrode materials for vanadium redox flow battery
ترجمه فارسی عنوان
بررسی الکتروشیمیایی اکسید گرافن تحت درمان با حرارت به عنوان مواد الکترود برای باطری جریان وانوادیم رادیواکتیو
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی مهندسی انرژی و فناوری های برق
چکیده انگلیسی
Thermically treated graphene oxides (TT-GOs) are synthesized at different temperatures, 100 °C, 150 °C, 200 °C and 300 °C in a reducing environment (20% H2/He) and investigated as electrode materials for vanadium redox flow battery (VRFB) applications. The treated graphene oxide-based electrodes are prepared by the wet impregnation method using carbon felt (CF) as support. The main aim is to achieve a suitable distribution of the dispersed graphene oxides on the CF surface in order to investigate the electrocatalytic activity for the VO2+/VO2+ and V2+/V3+ redox reactions in the perspective of a feasible large area electrodes scale-up for battery configuration of practical interest. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) are carried out in a three electrode half-cell to characterize the electrochemical properties of the TT-GO-based electrodes. Physico-chemical characterizations are carried out to corroborate the electrochemical results. The TT-GO sample treated at 100 °C (TT-GO-100) shows the highest electrocatalytic activity in terms of peak to peak separation (ΔE = 0.03 V) and current density intensity (∼0.24 A cm−2 at 30 mV/s) both toward the VO2+/VO2+ and V2+/V3+ redox reactions. This result is correlated to the presence of hydroxyl (OH) and carboxyl (COOH) species that act as active sites. A valid candidate is individuated as effective anode and cathode electrode in the perspective of electrodes scale-up for battery configuration of practical interest.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Energy - Volume 147, 1 June 2015, Pages 74-81
نویسندگان
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