Fabrication of reduced graphene oxide-cellulose nanofibers based hybrid film with good hydrophilicity and conductivity as electrodes of supercapacitor

Abstract

In this research, a kind of non-carbonized reduced graphene oxide (RGO)-cellulose nano bers (CNF) lm is constructed by a combination of ltration and chemical reduction. In the hybrid, RGO enhances conductivity of CNF, and CNF as an idea spacer not only prevents stacking of RGO but also gives the lm good mechanical properties including mechanical strength and exibility. The synergistic effect of both endows the lm with good electrochemical storage performance and outstanding mechanical properties. The hybrid lm can be directly assembled into a symmetrical supercapacitor that shows an outstanding cycle stability, excellent rate performance, good mechanical strength and exibility. Moreover, the lm presents a high speci c capacitance of 120 mF cm − 2 , energy density of 536 µWh cm − 2 (32 Wh kg − 1) and power density of 193 mW cm − 2 (53 kW kg − 1). Additionally, the lm can be used as a substrate to graft other components.

Cellulose nanofibrils–graphene hybrids: recent advances in fabrication, properties, and applications

“…More recently, another interesting solvent approach was developed by Xiong et al , who reported that direct treatment could effectively reach the reduction process of the hybrid via hydrogen iodine of CNFs/GO film, fabricated by ultrasonic and suction filtration. 129 The TEM images of the obtained nanocomposites are shown in Fig. 13V.…”

Cellulose-Derived Nanostructures as Sustainable Biomass for Supercapacitors: A Review

“…Here, rGO improves conductivity and the CNFs provide flexibility, improved mechanical properties, and prevent the stacking of the rGO nanosheets. Therefore, the composite film, assembled into an asymmetric supercapacitor, showed remarkable cyclic stability, rate performance, good mechanical strength and flexibility, high specific capacitance (120 mF/cm 2 ), energy density of 5361 Wh/cm 2 , and power density of 193 mWcm 2 [ 117 ]. Similarly, Chen et al fabricated a composite aerogel made of biomass carbon/rGO/CNFs through a one-step self-assembly process, where negatively charged CNFs acted as the binder between the biomass carbon and the rGO nanosheets.…”

Recent Development of Polyaniline/graphene Composite Electrodes for Flexible Supercapacitor Devices

“…Flexible supercapacitors with polyaniline/graphene composite electrodes have gained attention due to the symbiotic combination of the electrochemical and mechanical properties of polyaniline and graphene [10] . While graphene is one of the most outstanding carbon allotropes, possessing high conductivity, large surface area, excellent mechanical properties, and good chemical stability, [11] polyaniline can generate an extremely high theoretical capacitance (3000 F g −1 ) due to its pseudocapacitive nature [12] . The theoretical electrochemical double‐layer capacitance of single‐layer graphene can also reach ∼550 F g −1 when its entire surface area is fully utilized [13] .…”