Glue-Assisted Grinding Exfoliation of Large-Size 2D Materials for Insulating Thermal Conduction and Large-Current-Density Hydrogen Evolution

TL;DR

This paper introduces a glue-assisted grinding exfoliation (GAGE) method for scalable production of large, high-quality 2D materials, enabling advanced applications in thermal insulation and hydrogen evolution.

Contribution

The GAGE method uses adhesive polymers to efficiently produce large-area 2D materials, demonstrated on multiple compounds with potential for industrial applications.

Findings

Produced 2D h-BN with 2.18 μm lateral size and 3.91 nm thickness

Extended method to graphene, MoS2, and others

Demonstrated applications in thermal conduction and hydrogen evolution

Abstract

Two-dimensional (2D) materials have many promising applications, but their scalable production remains challenging. Herein, we develop a glue-assisted grinding exfoliation (GAGE) method in which the adhesive polymer acts as a glue to massively produce 2D materials with large lateral sizes, high quality, and high yield. Density functional theory simulation shows that the exfoliation mechanism involves the competition between the binding energy of selected polymers and the 2D materials which is larger than the exfoliation energy of the layered materials. Taking h-BN as an example, the GAGE produces 2D h-BN with an average lateral size of 2.18 {\mu}m and thickness of 3.91 nm. The method is also extended to produce various other 2D materials, including graphene, MoS2, Bi2O2Se, vermiculite, and montmorillonite. Two representative applications of thus-produced 2D materials have been demonstrated, including h-BN/polymer composites for insulating thermal conduction and MoS2 electrocatalysts for large-current-density hydrogen evolution, indicating the great potential of massively produced 2D materials.