UV‐Assisted One‐Step Synthesis of Ternary Graphene/Polypyrrole/Silver Nanocomposites for Supercapacitors

Abstract

Herein, a simple and convenient one‐step method to prepare ternary graphene/polypyrrole/silver (GE/PPy/Ag) nanocomposites with UV irradiation is demonstrated. The prepared GE/PPy/Ag nanocomposites show the desired design, in which Ag nanoparticles wrapped by a PPy layer are deposited on the surface of GE. Such a structure can combine the advantages of the three components, including the large surface area of GE, high pseudocapacitance of PPy, and superior conductivity of Ag, and overcome the shortcomings of the three components, including restacking of GE, poor cycling stability of PPy, and reunion of Ag nanoparticles. In addition, the Ag nanoparticles can store/release charges via reversible Ag/Ag+ redox to further improve the electrochemical performance of GE/PPy/Ag nanocomposites as supercapacitor electrodes. The GE/PPy/Ag nanocomposite prepared with 90 min UV irradiation exhibits the highest areal capacitance (294.2 mF cm−2), and the symmetric quasi‐solid‐state supercapacitor retains 80.1% capacitance retention after 5000 cycles. The GE/PPy/Ag nanocomposite can also be formulated as screen‐printing ink to fabricate planar micro‐supercapacitors by the screen‐printing technique, for applications in flexible energy storage devices.

Graphene-Based Inks for Flexible Supercapacitor Electrodes: A Review

“…120,121 Liang et al developed a graphene/PPy/Ag nanocomposites for SC electrodes. 122 It exhibited a structure with PPy-wrapped Ag nanoparticles deposited on a graphene surface (Figure 7e). This combines the advantages of higher surface area of graphene, PPy's high pseudocapacitance, and the excellent conductivity of Ag.…”

“…(f) CV curves and (g) GCD curves of graphene/PPy/Ag 90 -based planar micro-SC. Reproduced with permission from ref . Copyright 2021.…”

“…The synergistic effect of incorporating graphene into these composites increases the specific capacitance, rate capability, and cycling stability, making them ideal candidates for SC applications. The usage of PPy seems particularly promising for SCs due to its large energy storage capacity, strong electrical conductivity, simplicity of synthesis in aqueous solution, and stability in ambient circumstances. , Liang et al developed a graphene/PPy/Ag nanocomposites for SC electrodes . It exhibited a structure with PPy-wrapped Ag nanoparticles deposited on a graphene surface (Figure e).…”