Nanoparticles of metal chalcogenide (MoS2) are incorporated on reduced graphene oxide nano sheet rolled mesoporous manganese oxide were prepared by feasible ultrasonic assisted deposition technique. The above prepared nanocomposite is further coated on Nickel foam substrate for direct application towards high performance supercapcitor energy storage application. The detailed studies of surface and textural property such as crystalline phase stability, surface structure, particle size, zeta potential measurements have been explained for all prepared nanocomposite samples. The crystalline phase of as prepared mesoporous manganese oxide is forms the mixed phase of Mn2O3 bixbyite phase. The thermal stability of as prepared sample improved up to 400 °C in oxygen atmosphere and negative zeta potential obtained for all prepared nanocomposite sample. The different amount of MoS2 nanoparticle (10 mg −100 mg range) was utilized to study the effect of molybdenum sulphide (additive) addition on graphene oxide rolled mesoporous manganese oxide nanofiber matrix. Increased quantity of MoS2 addition increase the electrochemical supercapacitance value of the nanocomposite coated nickel foam based electrode. Nanofibers morphology of mesoporous manganese oxide with reduced graphene oxide is visibly seen in the TEM images. Needle like metallic rich shapes are also obtained due to MoS2 nanoparticle existence and it inserted in the Nanofiber/graphene sheet structure. The higher supercapacitance values are obtained for Nickel foam modified MoS2 deposited graphene oxide rolled MnOx nanocomposite (980 and 788 F/g) under acidic electrolyte medium and charge/discharge cycle stability have also been studied for all prepared nanocomposites.
|Journal||Journal of Alloys and Compounds|
|State||Published - Jan 5 2021|
Bibliographical noteFunding Information:
The electrochemical analysis and supercapcitor activity and were carried out by PARSTAT 4000 electrochemical workstation includes potentiostat/galvanostat and impedance technique in three electrode system. Silver in silver chloride and Pt wire was used as counter and reference electrode. The Nickel foam based working electrode was fabricated with active nanocomposite on one end of the nickel foam by hot pressing method. The length of nickel foam is 6 cm and width 1 cm, in which the area of loading active materials at end is 1 cm2 (1 cm × 1 cm) with 5 mg of active nanocomposite with Nafion conducting polymer. The mixture of 1 M H2SO4 and KI was used as supporting electrolyte and KI was added to avoid corrosion problem of nickel foam.The authors acknowledge their appreciation to the Deanship of Scientific Research at King Saud University for funding this work through research group no.(RG-1440-014) and also express gratitude to Researchers Supporting Service Unit for technical support. Author (R. J) thanks Dr . Meera Mohideen for TG technical support.
The authors acknowledge their appreciation to the Deanship of Scientific Research at King Saud University for funding this work through research group no.( RG-1440-014 ) and also express gratitude to Researchers Supporting Service Unit for technical support. Author (R. J) thanks Dr . Meera Mohideen for TG technical support.
© 2020 Elsevier B.V.
- Nickel foam
ASJC Scopus subject areas
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry