TY - JOUR
T1 - Role of Carbon Nanomaterials on Enhancing the Supercapacitive Performance of Manganese Oxide-Based Composite Electrodes
AU - Rehman, Zaeem Ur
AU - Raza, Mohsin Ali
AU - Chishti, Uzair Naveed
AU - Hussnain, Aoun
AU - Maqsood, Muhammad Faheem
AU - Iqbal, Muhammad Zahir
AU - Iqbal, Muhammad Javaid
AU - Latif, Umar
N1 - Funding Information:
Authors would like to thank higher education commission (HEC) of Pakistan for providing financial assistance to carry out this research work.
Publisher Copyright:
© 2022, King Fahd University of Petroleum & Minerals.
PY - 2022
Y1 - 2022
N2 - MnO2 is an attractive material owing to its high specific capacitance, excellent electrochemical activity, thermal and chemical stability, environmental benignity and broad potential window. However, its poor electrical conductivity limits its performance in supercapacitor applications. The electrical conductivity of MnO2 can be enhanced by making its composites with carbon nanomaterials as these offer superior electrical conductivity and high specific surface area. The present study is a comparative study on the effect of various types of carbon nanomaterials such as carbon nanotubes (CNTs), graphene oxide, thermally reduced graphene oxide, activated carbon and carbon nanofibers on the supercapacitive performance MnO2 electrodes by making composite electrodes. MnO2 was synthesized by a facile chemical reduction method, and calcination was performed at 200 °C to obtain amorphous state. MnO2-based composite electrodes were prepared using 10 wt.% of various carbon nanomaterials. Characterization of different carbon materials was carried out by X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy and atomic force microscopy. Composite electrodes were prepared by coating mixture, consisting of MnO2, carbon nanomaterials, carbon black and polyvinylidene fluoride on the surface of highly porous Ni foam using a high-speed vacuum planetary centrifugal mixer. Electrochemical characterization of the prepared electrodes was performed by cyclic voltammetry, galvanostatic charge discharge (GCD) and electrochemical impedance spectroscopy (EIS). GCD revealed that MnO2-CNTs composite electrodes showed maximum specific capacitance (SC) of 330 F/g at 1 A/g current density and areal capacitance of 3.16 F/cm2 with 5–7 mg mass loading of active material in 3 M KOH as an aqueous electrolyte. This SC was ca. 79% higher than pure MnO2 and also higher than previously reported MnO2/CNTs composite electrodes. MnO2-CNTs symmetric supercapacitor device showed excellent SC of 177 F/g at 1 A/g current density with 94% charge retention after 1000 GCD cycles. EIS analysis showed that MnO2-CNTs composite electrode had the lowest charge transfer resistance compared to other electrodes.
AB - MnO2 is an attractive material owing to its high specific capacitance, excellent electrochemical activity, thermal and chemical stability, environmental benignity and broad potential window. However, its poor electrical conductivity limits its performance in supercapacitor applications. The electrical conductivity of MnO2 can be enhanced by making its composites with carbon nanomaterials as these offer superior electrical conductivity and high specific surface area. The present study is a comparative study on the effect of various types of carbon nanomaterials such as carbon nanotubes (CNTs), graphene oxide, thermally reduced graphene oxide, activated carbon and carbon nanofibers on the supercapacitive performance MnO2 electrodes by making composite electrodes. MnO2 was synthesized by a facile chemical reduction method, and calcination was performed at 200 °C to obtain amorphous state. MnO2-based composite electrodes were prepared using 10 wt.% of various carbon nanomaterials. Characterization of different carbon materials was carried out by X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy and atomic force microscopy. Composite electrodes were prepared by coating mixture, consisting of MnO2, carbon nanomaterials, carbon black and polyvinylidene fluoride on the surface of highly porous Ni foam using a high-speed vacuum planetary centrifugal mixer. Electrochemical characterization of the prepared electrodes was performed by cyclic voltammetry, galvanostatic charge discharge (GCD) and electrochemical impedance spectroscopy (EIS). GCD revealed that MnO2-CNTs composite electrodes showed maximum specific capacitance (SC) of 330 F/g at 1 A/g current density and areal capacitance of 3.16 F/cm2 with 5–7 mg mass loading of active material in 3 M KOH as an aqueous electrolyte. This SC was ca. 79% higher than pure MnO2 and also higher than previously reported MnO2/CNTs composite electrodes. MnO2-CNTs symmetric supercapacitor device showed excellent SC of 177 F/g at 1 A/g current density with 94% charge retention after 1000 GCD cycles. EIS analysis showed that MnO2-CNTs composite electrode had the lowest charge transfer resistance compared to other electrodes.
KW - Carbon nanomaterials
KW - Manganese oxide
KW - Specific capacitance
KW - Symmetric supercapacitor, graphene oxide
KW - Thermally reduced graphene oxide
UR - http://www.scopus.com/inward/record.url?scp=85130170023&partnerID=8YFLogxK
U2 - 10.1007/s13369-022-06895-2
DO - 10.1007/s13369-022-06895-2
M3 - Article
AN - SCOPUS:85130170023
SN - 2193-567X
JO - Arabian Journal for Science and Engineering
JF - Arabian Journal for Science and Engineering
ER -