Few-layer covalent-C₆₀-network-stabilized bismuth nanoparticles for high-performance alkaline batteries

Area of Science:

• Materials Science
• Electrochemistry
• Nanotechnology

Background:

• Developing high-performance electrode materials is crucial for advanced energy storage.
• Bismuth nanoparticles (Bi) show promise but often suffer from aggregation and low surface area.
• Carbon allotropes offer unique structural and electronic properties for supporting nanoparticles.

Purpose of the Study:

• To construct few-layer quasi-hexagonal-phase C60-network-supported Bi nanoparticles (qHP-C60-Bi).
• To investigate the electrochemical performance of qHP-C60-Bi in alkaline batteries.
• To understand the structure-property relationships governing the enhanced performance.

Main Methods:

• In situ reduction process for synthesizing qHP-C60-Bi.
• Electrochemical testing in alkaline battery configurations.
• Characterization of material morphology, structure, and surface properties.

Main Results:

• Successfully synthesized qHP-C60-Bi with few-layer quasi-hexagonal-phase C60 support.
• Achieved a high specific capacity of 1187 C g^-1.
• Demonstrated excellent long-term cycling stability in alkaline batteries.

Conclusions:

• The qHP-C60 network effectively anchors Bi nanoparticles, preventing aggregation.
• The enlarged surface area and enhanced OH^- adsorption contribute to superior electrochemical performance.
• qHP-C60-Bi is a promising material for high-capacity alkaline battery applications.