Integrated Flexible Planar Supercapacitors Based on Noncarbonized Wood

Area of Science:

• Materials Science
• Energy Storage
• Electrochemistry

Background:

• Flexible planar supercapacitors are crucial for portable and wearable electronics.
• Developing sustainable and high-performance energy storage solutions is a key challenge.

Purpose of the Study:

• To create a flexible planar supercapacitor using delignified wood as a substrate and polypyrrole as electrode material.
• To investigate the impact of wood's porous structure on supercapacitor performance and stability.

Main Methods:

• Fabrication of interdigitated polypyrrole electrodes on delignified wood via vapor deposition polymerization.
• Characterization of electrode and device performance, including areal-specific capacitance and mechanical stability.
• Assessment of polypyrrole embedding within the wood substrate's channels.

Main Results:

• Polypyrrole electrodes achieved a high areal-specific capacitance of 1903.0 mF cm^-2.
• The integrated supercapacitor demonstrated an areal-specific capacitance of 172.0 mF cm^-2.
• The device exhibited excellent flexibility and mechanical stability due to the delignified wood substrate and polypyrrole integration.

Conclusions:

• Delignified wood serves as an effective and eco-friendly substrate for flexible planar supercapacitors.
• The proposed fabrication method enhances capacitance and device stability.
• This approach opens avenues for utilizing natural, porous materials in advanced energy storage applications.