Fabrication of Flexible Poly(m-aminophenol)/Vanadium Pentoxide/Graphene Ternary Nanocomposite Film as a Positive Electrode for Solid-State Asymmetric Supercapacitors

Abstract

In this study, poly(m-aminophenol) (PmAP) has been investigated as a multi-functional conductive supercapacitor binder to replace the conventional non-conductive binder, namely, poly(vinylene difluoride) (PVDF). The kye benefits of using PmAP are that it is easily soluble in common organic solvent and has good film-forming properties, and also its chemical functionalities can be involved in pseudocapacitive reactions to boost the capacitance performance of the electrode. A new ternary nanocomposite film based on vanadium pentoxide (V2O5), amino-functionalized graphene (amino-FG) and PmAP was fabricated via hydrothermal growth of V2O5 nanoparticles on graphene surfaces and then blending with PmAP/DMSO and solution casting. The electrochemical performances of V2O5/amino-FG/PmAP nanocomposite were evaluated in two different electrolytes, such as KCl and Li2SO4, and compared with those of V2O5/amino-FG nanocomposite with PVDF binder. The cyclic voltametric (CV) results of the V2O5/amino-FG/PmAP nanocomposite exhibited strong pseudocapacitive responses from the V2O5 and PmAP phases, while the faradaic redox reactions on the V2O5/amino-FG/PVDF electrode were suppressed by the inferior conductivity of the PVDF. The V2O5/amino-FG/PmAP electrode delivered a 5-fold greater specific capacitance than the V2O5/amino-FG/PVDF electrode. Solid-state asymmetric supercapacitors (ASCs) were assembled with V2O5/amino-FG/PmAP film as a positive electrode, and their electrochemical properties were examined in both KCl and Li2SO4 electrolytes. Although the KCl electrolyte-based ASC has greater specific capacitance, the Li2SO4 electrolyte-based ASC delivers a higher energy density of 51.6 Wh/kg and superior cycling stability.

Challenges and Opportunities: Conducting Polymer‐Graphene based Nanocomposites of Metal Oxides and Metal Sulfides for Supercapacitors

“…The study introduces PmAP as a potential alternative binder for supercapacitors, emphasizing its positive impact on capacitance performance and cycling stability. The results suggest its viability for use in flexible solid‐state supercapacitors for wearable electronic devices [90] …”

“…The results suggest its viability for use in flexible solid-state supercapacitors for wearable electronic devices. [90] A novel α-MnO 2 /PANI/rGO nanocomposite was developed and assessed for supercapacitor applications. The synthesis involved in situ polymerization of polyaniline (PANI) on α-MnO 2 , followed by the incorporation of rGO.…”

Influence of preparation method on the structure, morphology, and conducting property of poly(m‐aminophenol)/silver nanocomposite

“…Poly( m ‐aminophenol) has various advantages when combined with metal, metal oxide, and metal nanomaterials. It can be used as an inexpensive binder‐cum‐pseudocapacitive material for next‐generation supercapacitors, 45 functioned as the antibacterial agent and corrosion inhibitor, 46 and it was prepared by oxidative polymerization technique to act as a pour point depressant (PPDs) for paraffinic crude oil 47 . In general, however, a quantitative understanding of the relationship between morphology and performance is crucial to have improved electronic properties of composite materials for various desired applications with better performances.…”