Ferrites/reduced graphene oxide (RGO) in supercapacitors: MnZnFe2O4/RGO- based supercapacitors with superior performance and high stability

Joint Conference: International Conference on DIAMOND AND CARBON MATERIALS & GRAPHENE AND SEMICONDUCTORS

July 17-18, 2017 Chicago, USA

Ibrahim Ismail and Fatma Moustafa

Zewail City for Science and Technology, Egypt

Posters & Accepted Abstracts: J Material Sci Eng

Abstract :

Owing to the rapidly increasing demand for energy conversion devices, energy storage platforms have become significantly attractive more than any instance in the past. Indeed, supercapacitors are considered one of the most promising energy storage devices, due to their excellent reversibility, rapid charge/discharge, high power density, in addition to longlife and cyclic stability compared to the analogous electrochemical energy storage devices. Typically, supercapacitors can be classified into two basic categories, pseudo capacitors, and electrochemical double layer capacitors (EDLC). On the other hand, graphene-based materials are given much consideration as effective electrode materials owing to their high specific surface area, excellent chemical stability, electrical and mechanical properties, and the feasibility for large-scale production of chemically-modified graphene (CMGs). To this end, the Hummers� method is widely used to produce graphene oxides (GO). Herein, the electrochemical performance of the MnZnFe2O4/RGO colloidal nano needle-based supercapacitors is investigated. Cyclic voltammetry, galvanostatic charge�discharge and cycle stability have been investigated. The obtained results reveal that, the MnZnFe2O4/RGO colloidal nanorods have a superior specific capacitance higher than MnZnFe2O4. The MnZnFe2O4/RGO based- supercapacitors using H2SO4 electrolyte demonstrated the best cycle stability among all the supercapacitors.

Biography :

Email: imohamed@zewailcity.edu.eg