TY - JOUR
T1 - Synthesis and Characterization of Ternary α-Fe2O3/NiO/rGO Composite for High-Performance Supercapacitors
AU - Mummoorthi, Geerthana
AU - Shajahan, Shanavas
AU - Abu Haija, Mohammad
AU - Mahalingam, Umadevi
AU - Rajendran, Ramesh
N1 - Funding Information:
The authors would like to acknowledge the Ministry of Science and Technology, Department of Science and Technology (WOS-A) (file no. SR-WOS-A/PM-71/2017), and DST-SERB, India (file no. EMR/2017/001238), for the financial support. Authors S. Shanavas and Mohammad AbuHaija thank Khalifa University of Science and Technology for their support under CIRA-2020-085.
Publisher Copyright:
© 2022 The Authors. Published by Chemical Society.
PY - 2022/8/9
Y1 - 2022/8/9
N2 - Herein, pure α-Fe2O3, binary α-Fe2O3/NiO, and ternary α-Fe2O3/NiO/rGO composites were prepared by a hydrothermal method. The properties of the prepared materials were studied by powder X-ray diffraction, scanning electron microscopy, TEM, XPS, and Brunauer-Emmett-Teller techniques. The clusters of smaller α-Fe2O3 nanoparticles (∼30 nm) along with conducting NiO was freely covered by the rGO layer sheet, which offer a higher electrode-electrolyte interface for improved electrochemical performance. The ternary composite has shown a higher specific capacitance of 747 F g-1@ a current density of 1 A g-1 in a 6 M KOH solution, when compared with that of α-Fe2O3/rGO (610 F g-1@1 A g-1) and α-Fe2O3 (440 F g-1@1 A g-1) and the nanocomposite. Moreover, the ternary α-Fe2O3/NiO/rGO composite exhibited a 98% rate capability @ 10 A g-1. The exceptional electrochemical performance of ternary composites has been recognized as a result of their well-designed unique architecture, which provides a large surface area and synergistic effects among all three constituents. The asymmetric supercapacitor (ASC) device was assembled using the ternary α-Fe2O3/NiO/rGO composite as the anode electrode (positive) material and activated carbon as the cathode (negative) material. The ASC device has an energy density of 35.38 W h kg-1 at a power density of 558.6 W kg-1 and retains a 94.52% capacitance after 5000 cycles at a 1 A g-1 current density.
AB - Herein, pure α-Fe2O3, binary α-Fe2O3/NiO, and ternary α-Fe2O3/NiO/rGO composites were prepared by a hydrothermal method. The properties of the prepared materials were studied by powder X-ray diffraction, scanning electron microscopy, TEM, XPS, and Brunauer-Emmett-Teller techniques. The clusters of smaller α-Fe2O3 nanoparticles (∼30 nm) along with conducting NiO was freely covered by the rGO layer sheet, which offer a higher electrode-electrolyte interface for improved electrochemical performance. The ternary composite has shown a higher specific capacitance of 747 F g-1@ a current density of 1 A g-1 in a 6 M KOH solution, when compared with that of α-Fe2O3/rGO (610 F g-1@1 A g-1) and α-Fe2O3 (440 F g-1@1 A g-1) and the nanocomposite. Moreover, the ternary α-Fe2O3/NiO/rGO composite exhibited a 98% rate capability @ 10 A g-1. The exceptional electrochemical performance of ternary composites has been recognized as a result of their well-designed unique architecture, which provides a large surface area and synergistic effects among all three constituents. The asymmetric supercapacitor (ASC) device was assembled using the ternary α-Fe2O3/NiO/rGO composite as the anode electrode (positive) material and activated carbon as the cathode (negative) material. The ASC device has an energy density of 35.38 W h kg-1 at a power density of 558.6 W kg-1 and retains a 94.52% capacitance after 5000 cycles at a 1 A g-1 current density.
UR - http://www.scopus.com/inward/record.url?scp=85136277442&partnerID=8YFLogxK
U2 - 10.1021/acsomega.2c02418
DO - 10.1021/acsomega.2c02418
M3 - Article
AN - SCOPUS:85136277442
SN - 2470-1343
VL - 7
SP - 27390
EP - 27399
JO - ACS Omega
JF - ACS Omega
IS - 31
ER -