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<p>Flexible stainless steel substrates (SS) were used to deposit reduced graphene oxide (rGO)/ molybdenum oxide (MoO<sub>3</sub>) thin films by cost-effective chemical bath deposition (CBD) method varying rGO concentrations (1, 3, and 5&#xa0;mg&#xa0;mL<sup>−1</sup>). The influence of rGO incorporation on the structural and electrochemical properties of electrodes was investigated. The thin films of RMO2 (deposited at 3&#xa0;mg&#xa0;mL<sup>−1</sup> rGO concentration) nanocomposites demonstrated a hexagonal crystal structure and nanoparticles like surface morphology. The presence of rGO in rGO/MoO<sub>3</sub> was confirmed by the Raman and EDS studies. RMO2 nanocomposite thin film exhibited 547&#xa0;F g<sup>−1</sup> specific capacitance at current density of 2&#xa0;mA&#xa0;cm<sup>−2</sup>. The flexible RMO2//PVA-H<sub>2</sub>SO<sub>4</sub>//PANI asymmetric (ASC) device was assembled using RMO2 as a negative electrode and PANI as a positive electrode. The device showed a specific capacitance of 61.5&#xa0;F g<sup>−1</sup> with energy and power densities of 14.4&#xa0;Wh kg<sup>−1</sup> and 1.3&#xa0;KW kg<sup>−1</sup>, respectively, with 84.3% capacitive retention over 5,000 CV cycles.</p> Graphical abstract <p></p>

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Binder-free chemical synthesis of reduced graphene oxide/transition metal oxide-based composite for supercapacitor application

  • 期刊论文

  • 发表日期：

    2025年12月25日

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  • Sujata B. Patil,
  • Tamseen M. Nejkar,
  • Ranjit P. Nikam,
  • Amol A. Suryawanshi,
  • Chandrakant D. Lokhande,
  • Raghunath S. Patil

摘要

Flexible stainless steel substrates (SS) were used to deposit reduced graphene oxide (rGO)/ molybdenum oxide (MoO3) thin films by cost-effective chemical bath deposition (CBD) method varying rGO concentrations (1, 3, and 5 mg mL−1). The influence of rGO incorporation on the structural and electrochemical properties of electrodes was investigated. The thin films of RMO2 (deposited at 3 mg mL−1 rGO concentration) nanocomposites demonstrated a hexagonal crystal structure and nanoparticles like surface morphology. The presence of rGO in rGO/MoO3 was confirmed by the Raman and EDS studies. RMO2 nanocomposite thin film exhibited 547 F g−1 specific capacitance at current density of 2 mA cm−2. The flexible RMO2//PVA-H2SO4//PANI asymmetric (ASC) device was assembled using RMO2 as a negative electrode and PANI as a positive electrode. The device showed a specific capacitance of 61.5 F g−1 with energy and power densities of 14.4 Wh kg−1 and 1.3 KW kg−1, respectively, with 84.3% capacitive retention over 5,000 CV cycles.

Graphical abstract