Environmentally Friendly Water-Based Reduced Graphene Oxide/Cellulose Nanofiber Ink for Supercapacitor Electrode Applications

Abstract

The agglomeration of reduced graphene oxide (rGO) in water makes the development of rGO inks for supercapacitor printing challenging. Cellulose nanofiber (CNF), a biodegradable and renewable nanomaterial, can act as a nanospacer, preventing the agglomeration and restacking of rGO flakes. In this work, rGO/CNF films were fabricated using an environmentally friendly water-based rGO/CNF ink. In the absence of an additional binder/surfactant, the rGO/CNF films demonstrated remarkably enhanced hydrophilicity while retaining good electrical conductivity. The concentration of CNF was varied to observe the variation in the electrochemical performance. At a current density of 1 mA/cm 2 , the rGO/CNF-15 film exhibited a maximum areal capacitance of 98.61 mF/cm 2 , closely matching that of pure rGO films. Because of its excellent electrical performance, ease of manufacturing, and environmental friendliness, this water-based rGO/CNF ink may have promising applications in the printing of supercapacitor electrodes.

Upcycling waste plastic into 2D-carbon nanomaterials for high-performance supercapacitors by incorporating NiCo2O4: a sustainable approach to renewable energy

“…In our work, we add NiCo 2 O 4 to the surface of WPrGO, which greatly enhances its suitability for use in supercapacitors. 52–54…”

Recent Progress Using Graphene Oxide and Its Composites for Supercapacitor Applications: A Review

“…Recently, reviews on using graphene and GO-based composites in supercapacitor applications, including GO, AC/graphene, graphene/vanadium, graphene-based gels, graphene/nano cellulose, graphene/metal oxide, GO/MXenes, metal oxide/rGO, rGO/ cellulose, iron oxide/graphene, rGO/polypyrrole, GO/MOFs, LDHs/rGO, GO-based aerogels, and poly(cyclotriphosphazene)/GO, have been published [15,49,[60][61][62][63][64][65][66][67][68][69][70][71][72][73][74][75]. In contrast, this review focuses on several types of materials, including metal oxides, metal sulfides, metal chalcogenides, MOFs, and MXene composites with GO, as well as fluorine, bacteria, and other organic functionalization with GO.…”