Carbon sphere @ nickel cobalt manganese trinary metal oxide composite synthesized via optimal temperature water bath technique for hybrid supercapacitors

• Published in: Applied physics. A, Materials science & processing Vol. 130; no. 7
• Main Authors: Ponniah, Mahalakshmi, Thomai, Arul Raja, Amalorpavam, Simon Justin, Ravi, Vinoth Kumar, Palanisamy, Vickraman
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01-07-2024; Springer Nature B.V
• Subjects: Aqueous electrolytes; Capacitance; Carbon; Characterization and Evaluation of Materials; Condensed Matter Physics; Graphene; Machines; Manganese; Manufacturing; Metal oxides; Nanospheres; Nanotechnology; Optical and Electronic Materials; Optimization; Physics; Physics and Astronomy; Processes; Supercapacitors; Surfaces and Interfaces; Synthesis; Thin Films; Water baths; Nickel cobalt manganese oxide; Trinary metal oxide composite; Reduced graphene oxide; Hybrid supercapacitor; Carbon sphere
• ISSN: 0947-8396; 1432-0630
• DOI: 10.1007/s00339-024-07669-3

Novel carbon sphere (CS) @ NiCoMn oxide is synthesized via optimum-temperature-water-bath method and characterized by XRD, FT-IR, HR-TEM, EDAX, BET and electrochemical studies. The XRD, FT-IR, and HR-TEM show the structural and molecular coordination of carbon nanospheres within NiCoMnO nano clouds. The EDAX confirms the presence of Ni, Co, Mn, O, and C elements and BET analysis reveals higher surface area for CS@NiCoMnO (172.795 m
2
g
− 1
) than the pristine NiCoMnO (99.813 m
2
g
− 1
). The CV, GCD, and Electrochemical impedance studies reveal the pseudocapacitive behaviour of CS@NiCoMnO and delivers enhanced specific capacitance of 992 Fg
− 1
at 1 A g
− 1
in 3 M KOH aqueous electrolyte. The CS@NiCoMnO // reduced graphene oxide (rGO) hybrid device in 6 M KOH delivered the specific capacitance of 194 Fg
− 1
at 2 A g
− 1
with energy and power densities 39.25 Wh kg
− 1
and 604.81 W kg
− 1
at 2 A g
− 1
. The complexation of CS with the tri-metallic NiCoMnO enhances its cyclic stability and retained 98% of its maximum capacity whereas the full-cell device withholds 88% capacity retention after 5000 charge-discharge cycles, suggesting for hybrid supercapacitor applications.