Silver nanoparticles decorated polypyrrole/graphene nanocomposite: A potential candidate for next‐generation supercapacitor electrode material

Abstract

In the present study, we report a simple method to synthesize silver (Ag)-polypyrrole (PPy)/graphene (Gr) nanocomposite as efficient electrode materials for supercapacitor application. The probable interaction between Ag nanoparticles with both PPy and Gr were characterized by FTIR, UV-visible, and Raman spectroscopies. The morphological analysis confirmed that the Gr sheets are uniformly coated by PPy and in the coated Gr sheets there is the presence of Ag nanoparticles. The Ag-PPy/Gr nanocomposite achieved the highest specific capacitance of 472 F/g at a 0.5 A/g current density. Better energy and power density also obtained for the nanocomposite. The presence of both Ag nanoparticles and Gr is the main reason for the enhancement of the electrochemical properties of the nanocomposite. Based on the superior electrochemical properties, the nanocomposite can be used for nextgeneration supercapacitor electrode material.

A sensitive electrochemical sensor based on polypyrrole/electrochemically reduced graphene oxide for the determination of imidacloprid

“…Peaks at 971 and 1051 cm -1 correspond to the ring deformation and the C-H in-plane deformation of PPy, respectively. As for ERGO, the characteristic D and G bands could be observed at 1347 and 1584 cm -1 , respectively [27,28]. D band exhibits the sp 3 defects in the sp 2 -hybridized carbon network, while G band indicates doubly degenerate optical phonon of E2g symmetry [29].…”

Functionalized polystyrene maleic anhydride copolymer/ZnO nanocomposites for enhanced electrochemical performance

“…Among the various energy storage devices, batteries and supercapacitors represent the two foremost electrochemical energy storage devices. Supercapacitors are more significant when compared to various other energy storage devices such as rechargeable batteries and conventional capacitors due to its high specific power, moderate energy density, excellent reversibility, ecofriendly nature, and long life .…”

Crosslinked quaternized poly(arylene ether sulfone) copolymer membrane applied in an electric double‐layer capacitor for high energy density

“…The development of low‐cost and environmentally friendly energy‐conversion and energy‐storage devices is particularly important . Electric double‐layer capacitors (EDLCs), also referred to as supercapacitors or electrochemical capacitors, have been considered one of the most promising candidates for application in energy‐efficient industrial equipment and hybrid electric vehicles because of their fast charge–discharge rate and long cycling life …”

“…[1][2][3][4] Electric double-layer capacitors (EDLCs), also referred to as supercapacitors or electrochemical capacitors, have been considered one of the most promising candidates for application in energy-efficient industrial equipment and hybrid electric vehicles because of their fast charge-discharge rate and long cycling life. [5][6][7][8][9] The electrolyte is considered the key component determining the operating voltage, safety, and lifespan of EDLC single cells; 10,11 however, the main focus of investigations on supercapacitors has been on the design and preparation of the electrode materials, 1,2 whereas less research has been carried out on separator materials and electrolytes. Organic electrolytes can provide a high decomposition potential (2.5-2.7 V) to achieve a high energy density in EDLC single cells (E cell ).…”