Polyaniline-Lignin Interpenetrating Network for Supercapacitive Energy Storage
Neda Dianat1, Mohammad S Rahmanifar2, Abolhassan Noori1
1Department of Chemistry, Faculty of Basic Sciences, Tarbiat Modares University, Tehran 14115-175, Iran.
Nano Letters
|November 5, 2021
Summary
Researchers developed a novel nanocomposite using polyaniline and lignosulfonate for high-performance supercapacitors. This environmentally friendly material offers superior energy storage and stability, utilizing waste for advanced applications.
Area of Science:
- Materials Science
- Electrochemistry
- Sustainable Energy
Background:
- Growing demand for eco-friendly energy storage solutions.
- Biopolymers like sulfonated lignin (lignosulfonate, LS) are explored for supercapacitors.
- Polyaniline (PANI) is a conducting polymer with potential for energy storage.
Purpose of the Study:
- To create a high-performance nanocomposite for supercapacitors using polyaniline and lignosulfonate.
- To investigate the electrochemical properties of the polyaniline-lignosulfonate (PANI-LS) system.
- To demonstrate a waste-to-wealth approach for enhancing supercapacitor performance.
Main Methods:
- Fabrication of a uniform PANI-LS film via controlled potential pulse patterns.
- Electrochemical characterization of the PANI-LS nanocomposite.
- Assembly and testing of a symmetric PANI-LS||PANI-LS supercapacitor device.
Main Results:
- Achieved a specific capacitance of 1200 F g⁻¹ at 1 A g⁻¹, attributed to fast H⁺ kinetics.
- Demonstrated high specific energy (21.2 W h kg⁻¹) and specific power (26.0 kW kg⁻¹).
- Exhibited excellent flexibility and cycling stability in the PANI-LS device.
Conclusions:
- The PANI-LS nanocomposite surpasses existing conducting polymer-lignin supercapacitors.
- Fast proton kinetics significantly contribute to the enhanced supercapacitive performance.
- This study presents a sustainable method for developing advanced energy storage materials from waste.
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