Synthesis of manganese ferrite/graphene oxide nanocomposite and investigation of its supercapacitor behaviors

超级电容器 纳米复合材料 材料科学 石墨烯 循环伏安法 电化学 氧化物 电极 化学工程 复合数 储能 纳米技术 复合材料 冶金 化学 物理化学 工程类 功率(物理) 物理 量子力学
作者
Najmeh Foroutan,Mohammad Soleimani Lashkenari,Ebrahim Alizadeh,Majid Sedighi
出处
期刊:International Journal of Hydrogen Energy [Elsevier]
卷期号:48 (66): 25859-25868 被引量:13
标识
DOI:10.1016/j.ijhydene.2023.03.148
摘要

Currently, researchers are struggling with the development of energy storage systems, like high energy density supercapacitors, with cheap cost and high stability. Herein research we present a facile preparation and evaluation of the manganese ferrite/graphene oxide (MnFe2O4/GO) nanocomposite electrochemical behavior as active electrode material in supercapacitors. The chemical composition and morphology were specified with different physicochemical characterization techniques. The TEM and FESEM images exhibit MnFe2O4 semi-spherical nanoparticles on GO plates. The prepared electrodes performance were proceeded with charge-discharge galvanostatic measurement (GCD), electrochemical impedance (EIS), and cyclic voltammetry (CV). The specific capacity value of MnFe2O4/GO new composite determined 298 F g−1 in 1 A/g current density. Also MnFe2O4/GO electrodic composite shows acceptable GCD stability, by maintaining its original capacity of 92% at 500 cycles. The EIS analysis also displays low internal resistance of MnFe2O4/GO compared to other electrodes in the same conditions. In addition to experimental analysis, density functional theory was also used to get a more accurate understanding of the electrochemical behavior of electrode materials. The theoretical results showed that with the formation of MnFe2O4/GO nanocomposite, the electron conductivity is improved (energy gap decreases to 0.019 eV) and leads to an increase in supercapacitor performance, which is in agreement with the experimental results.
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