Self-Assembled N/S Codoped Flexible Graphene Paper for High Performance Energy Storage and Oxygen Reduction Reaction
Taslima Akhter1, Md Monirul Islam1, Shaikh Nayeem Faisal2
1Institute for Superconducting and Electronic Materials, Australian Institute for Innovative Materials (AIIM) Facility, University of Wollongong , Innovation Campus, North Wollongong, New South Wales 2522, Australia.
ACS Applied Materials & Interfaces
|January 5, 2016
Summary
Researchers developed a flexible 3D nitrogen and sulfur codoped graphene architecture for energy storage and catalysis. This novel material demonstrates exceptional supercapacitor performance and acts as an efficient metal-free oxygen reduction reaction catalyst.
Area of Science:
- Materials Science
- Electrochemistry
- Nanotechnology
Background:
- Graphene-based materials are crucial for advanced energy storage and catalysis.
- Developing flexible, high-performance, and multifunctional graphene architectures remains a significant challenge.
Purpose of the Study:
- To synthesize a novel flexible three-dimensional (3D) nitrogen and sulfur codoped graphene architecture.
- To evaluate its performance as a free-standing electrode in supercapacitors.
- To assess its electrocatalytic activity for the oxygen reduction reaction.
Main Methods:
- Synthesis via thermal treatment of liquid crystalline graphene oxide and a doping agent.
- Soft self-assembly approach to create a macro- and nanoporous 3D network.
- Electrochemical testing for supercapacitor performance and oxygen reduction reaction catalysis.
Main Results:
- Achieved a high specific capacitance of 305 F g⁻¹ and volumetric capacitance of 188 F cm⁻³.
- Demonstrated excellent energy density (28.44 Wh kg⁻¹) and cycle life (10,000 cycles).
- Exhibited good electrocatalytic performance, durability, and selectivity for the oxygen reduction reaction.
Conclusions:
- The synthesized 3D nitrogen/sulfur codoped graphene architecture offers a promising platform for flexible energy storage devices.
- This material serves as an efficient metal-free catalyst for the oxygen reduction reaction.
- The study presents an effective strategy for creating multifunctional heteroatom-doped graphene frameworks.
