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A Standard and Reliable Method to Fabricate Two-Dimensional Nanoelectronics

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Published on: August 28, 2018

Bidirectional Superionic Conduction in Surface-Engineered 2D Hexagonal Boron Nitrides.

Jasneet Kaur¹, Adel Malekkhouyan¹, Gurpreet S Selopal^2,3

¹Nano-Engineering Laboratory of Energy & Environmental Technologies, Department of Chemical Engineering, Faculty of Engineering & Architectural Science, Ryerson University, Toronto, Ontario M5B 2K3, Canada.

ACS Applied Materials & Interfaces

|January 27, 2021

Summary

This summary is machine-generated.

Functionalized hexagonal boron nitride (FhBN) nanoflakes offer enhanced proton conductivity for next-generation polymer electrolyte membranes (PEMs). These FhBN-Nafion nanocomposites show significantly improved performance in energy storage and conversion systems.

Keywords:

2D hexagonal boron nitride nanoflakes Grotthuss mechanism energy materials liquid-phase exfoliation polymer electrolyte membranes proton conductivity

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Published on: October 12, 2019

Area of Science:

Materials Science
Electrochemistry
Nanotechnology

Background:

Polymer electrolyte membranes (PEMs) are crucial for energy storage and conversion.
Current PEMs face limitations in proton conductivity and stability.
Hexagonal boron nitride (hBN) is explored for its potential in advanced materials.

Purpose of the Study:

To design and synthesize functionalized hexagonal boron nitride (FhBN) nanoflakes.
To develop high-performance FhBN-Nafion nanocomposite PEMs.
To investigate the enhanced proton conductivity and properties of these novel PEMs.

Main Methods:

One-step, in situ liquid-phase exfoliation for FhBN nanoflakes functionalized with sulfonic acid (SA) groups.
Spectroscopic and microscopic characterization to confirm chemical interactions.
Fabrication of FhBN-Nafion nanocomposite PEMs at high FhBN concentrations (65 and 75 wt %).

Main Results:

FhBN nanoflakes exhibited excellent dispersibility and stability.
FhBN-Nafion PEMs showed doubled ion-exchange capacity and reduced swelling compared to Nafion.
Maximum in-plane and through-plane conductivities reached 0.41 and 0.1 S·cm⁻¹, respectively, significantly outperforming Nafion.

Conclusions:

FhBN nanoflakes are effective in enhancing proton conductivity in PEMs.
The developed FhBN-Nafion nanocomposites offer superior performance for electrochemical energy devices.
Bidirectional superionic transport in FhBN PEMs leads to outstanding properties.