Electrochemical, bonding network and electrical properties of reduced graphene oxide-Fe2O3 nanocomposite for supercapacitor electrodes applications

被引：78

作者：

Bhujel, Rabina ^{[1
]}

Rai, Sadhna ^{[1
]}

Deka, Utpal ^{[2
]}

Swain, Bibhu P. ^{[3
]}

机构：

[1] Sikkim Manipal Univ, Sikkim Manipal Inst Technol, Ctr Mat Sci & Nanotechnol, Rangpo 737136, Sikkim, India

[2] Sikkim Manipal Univ, Sikkim Manipal Inst Technol, Dept Phys, Rangpo 737136, Sikkim, India

[3] Natl Inst Technol, Dept Phys, Langol 795004, Manipur, India

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2019年 / 792卷

关键词：

RGO/Fe2O3; nanocomposite; Supercapacitor electrodes; Cyclic-voltametry; Impedance spectroscopy; OXIDE COMPOSITE; NICKEL FOAM; ENERGY; HYDROXIDE; DESIGN;

D O I：

10.1016/j.jallcom.2019.04.004

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A novel nanocomposite electrode material consisting of Fe2O3 and reduced graphene oxide (RGO/Fe2O3) has been synthesized using a cost-effective chemical approach for its application in the field of energy storage devices. The morphological and structural characterizations of the as-synthesized RGO/Fe2O3 nanocomposite materials were done using scanning electron microscopy (SEM) and X-ray diffraction respectively. The electrochemical properties of the RGO/Fe2O3 nanocomposite were evaluated by cyclic voltammetry and electrochemical impedance spectroscopy. The RGO5/Fe2O3 nanocomposite exhibited higher specific capacitance (50 Fg(-1)) at a scan rate of 0.1 V/s in 0.5MH(2)SO(4) solution than the pristine RGO. Moreover, the impedance spectroscopy showed that the value of charge transfer resistance (RCT) was 91.1 and 21.64 Omega for RGO(1)/Fe2O3 and RGO5/Fe2O3 respectively, indicating a decrease in the charge transfer resistance and increased charge conductivity for RGO5/Fe2O3. This low-cost protocol provides an alternative pathway for the large-scale production of various composite materials with controllable dimensions for energy storage and conversions. (C) 2019 Published by Elsevier B.V.

引用

页码：250 / 259

页数：10

共 36 条

[1] Novel π-conjugated iron oxide/reduced graphene oxide nanocomposites for high performance electrochemical supercapacitors [J].