Modified Co₄N by B-doping for high-performance hybrid supercapacitors.

Area of Science:

• Materials Science
• Electrochemistry
• Energy Storage

Background:

• Growing demand for efficient energy storage solutions to address future energy crises.
• Need for advanced electrode materials with enhanced electrochemical properties.

Purpose of the Study:

• To design and synthesize hierarchical B-Co4N nanostructures on nickel foam (NF) for high-performance energy storage.
• To investigate the impact of boron doping on the electrochemical performance of Co4N.

Main Methods:

• Chemical reduction strategy for synthesizing B-Co4N on Ni foam.
• Electrochemical characterization of the B-Co4N-20/NF electrode.
• Assembly and testing of a hybrid supercapacitor using B-Co4N-20/NF electrodes.

Main Results:

• B-Co4N-20/NF electrode exhibited a high specific capacity of 817.9 C g-1 at 1 A g-1.
• Demonstrated excellent rate capability, retaining 90.9% capacity at 10 A g-1.
• Achieved remarkable cycling stability with 93.06% capacity retention after 5000 cycles.

Conclusions:

• Boron doping effectively enhances ion and electron transport and increases electrochemically active sites in Co4N.
• The hierarchical B-Co4N structure provides a promising platform for next-generation energy storage devices.
• The developed material shows potential for high-performance supercapacitors with high energy density (25.85 Wh kg-1) and long cycle life.