Dermis-Inspired Ni₃S₂-Modified Bamboo-Based Sandwich-Structured Flexible Electrodes.

Area of Science:

• Materials Science
• Electrochemistry
• Biomaterials Engineering

Background:

• Flexible electrodes are crucial for wearable electronics and energy storage.
• Biomass-based materials offer sustainable and cost-effective alternatives.
• Existing biomass electrodes often face limitations in mechanical strength and electrochemical performance.

Purpose of the Study:

• To design and prepare novel sandwich-structured flexible electrodes (SSFE) with high specific capacitance.
• To mimic skin structure for enhanced mechanical properties and electrochemical efficiency.
• To provide guidance for developing high-performance biomass-based flexible electrodes.

Main Methods:

• Fabrication of nickel sulfide-modified bamboo fiber membranes (Ni3S2/BFM) as the surface layer.
• Development of a dual-network conductive adhesive (CA) using a polysiloxane matrix and polypyrrole-coated bamboo fiber (PPy@BF) as the core layer.
• Characterization of the electrochemical performance and mechanical properties of the SSFE.

Main Results:

• The SSFE achieved an impressive areal capacitance of 6760 mF·cm⁻².
• The Ni/Ni3S2 support network and dual-network conductive adhesive ensured efficient electronic transport.
• The biomimetic sandwich structure enhanced mechanical strength and reduced electron transport pathways.

Conclusions:

• The developed SSFE demonstrates excellent electrochemical performance, meeting demands for high specific capacitance.
• The biomimetic design offers a promising strategy for creating robust and efficient biomass-based flexible electrodes.
• This work provides valuable insights for advancing flexible energy storage technologies.