Ordered, Scalable Heterostructure Comprising Boron Nitride and Graphene for High-Performance Flexible Supercapacitors

Abstract

Heterostructures based on combining two-dimensional (2D) crystals in one stack have unusual physical properties and allow the creation of novel devices. Although this method of mechanically transferring individual 2D crystals is required for precise control, it is not scalable. Large-scale fabrication of heterostructures remains a key challenge for practical applications.Here, we provide a simple solution-based method using electrostatic interaction assembly of boron nitride (h-BN) and graphene to produce hybrid films with van der Waals heterostructures. The hybrid films prepared by this fabrication method tend to be alternately stacked and provide compact structured films. For a potential application, the h-BN/graphene hybrid films are fabricated supercapacitor's electrodes revealing high volumetric capacitance, superior rate capability, a permanent life cycle, and high flexibility due to their synergistic effects. We anticipate that the hybrid films are useful as scalable flexible electrodes in supercapacitors, and our solution-based method has great potential for application in energy storage and electronics.

Tailoring the performance of magnetic elastomers containing Fe2O3 decorated carbon nanofiber

“…3b), the C1s spectra of the hybrids can be tted to the mainly C-C bonds in aromatic rings (284.6 eV), C-O (286.1 eV) and C]O-OH (289.0 eV). 13,14 From the Fe2p narrow scan (Fig. 3c), the peaks of Fe2p 3/2 and Fe2p 1/2 (711.2 and 724.5 eV) observed in the hybrids are the characteristic positions of Fe 2 O 3 .…”

Recent Applications of 2D Inorganic Nanosheets for Emerging Energy Storage System

“…[189] In addition, h-BN nanosheets have successfully been utilized in flexible supercapacitors as 2D structural support and electrolyte channel. [190] The large surface area of g-C 3 N 4 rendered this materialauseful buildingb lock for hybrid-type supercapacitore lectrodes. [191] Also, the 2D MOF nanosheet, with sufficient surface area and pores for electrolyte diffusion, showed promising electrode activity for supercapacitors.…”

“…In one instance, the immobilization of Co‐Al‐LDH on the hybrid matrix of MnO 2 and rGO nanosheets led to the remarkable improvement of supercapacitor electrode functionality of LDH . In addition, h‐BN nanosheets have successfully been utilized in flexible supercapacitors as 2D structural support and electrolyte channel . The large surface area of g‐C 3 N 4 rendered this material a useful building block for hybrid‐type supercapacitor electrodes .…”

Flexible Supercapacitors Based on Graphene/Boron Nitride Nanosheets Electrodes and PVA/PEI Gel Electrolytes

“…With a similar crystal structure to graphene, BNNS could be easily assembled into graphene by a simple ultrasonic blending approach. Meanwhile, the integration of BNNS into graphene could stabilize and promote the capacitance of the graphene electrodes [ 27 ]. Herein, we proposed a wearable supercapacitor (WSC) based on graphene/BNNS electrodes and PVA/PEI-based hydrogel electrolytes ( Figure 1 ).…”