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Reductive Electropolymerization of a Vinyl-containing Poly-pyridyl Complex on Glassy Carbon and Fluorine-doped Tin Oxide Electrodes
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Bayesian-Optimization-Assisted Laser Reduction of Poly(acrylonitrile) for Electrochemical Applications
ACS Nano
|February 22, 2023
Summary
Researchers developed a new method to synthesize laser-induced graphene from poly(acrylonitrile) (PAN), a polymer previously thought unsuitable. This breakthrough enables cost-effective production of advanced carbon materials for applications like vanadium redox flow batteries.
Area of Science:
- Materials Science
- Electrochemistry
- Polymer Chemistry
Background:
- Laser reduction is a rapid method for synthesizing graphitic and carbonaceous materials.
- Poly(acrylonitrile) (PAN) has been considered unsuitable for laser reduction into electrochemically active materials.
- Existing methods are limited to specific polymers and graphene oxide.
Purpose of the Study:
- To overcome the limitations of laser reduction for poly(acrylonitrile) (PAN).
- To synthesize electrochemically active materials from PAN using laser reduction.
- To demonstrate the application of laser-reduced PAN in membrane electrodes for vanadium redox flow batteries (RFBs).
Main Methods:
- Thermal stabilization of PAN to enhance sp2 content.
- Pre-laser treatment microstructuring to mitigate thermal stress effects.
- Bayesian optimization for laser processing parameter exploration.
Main Results:
- Successful synthesis of laser-reduced PAN with low sheet resistance (6.5 Ω sq-1) in a single step.
- Demonstrated electrochemical performance of the synthesized material.
- Stable cycling of membrane electrodes for vanadium redox flow batteries over 2 weeks at 40 mA cm-2.
Conclusions:
- Developed novel strategies to enable laser reduction of PAN.
- Achieved high-quality, low-resistance graphitic materials from PAN.
- Showcased the potential of laser-reduced porous polymers for membrane electrode applications in energy storage devices like RFBs.
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