Laser-Induced High-Density Bi-F-C Sites to Unleash Potent Li⁺ Adsorption for Stable Lithium Anodes.

Area of Science:

• Materials Science
• Nanotechnology
• Electrochemistry

Background:

• Synthesizing high-loading single-atom materials is challenging due to metal atom aggregation.
• Conventional thermal methods often lead to atomic diffusion and aggregation.

Purpose of the Study:

• To develop a novel strategy for synthesizing high-loading single-atom materials with controlled atomic dispersion.
• To overcome the aggregation limitations in traditional synthesis methods.

Main Methods:

• Electrostatic pre-organization and laser-driven carbonization (EPO-LDC) strategy.
• Utilizing Nafion to pre-organize Bi3+ ions and ultrafast laser quenching for non-equilibrium synthesis.
• Employing fluorine ligands for atomic stabilization and charge redistribution.

Main Results:

• Achieved high-density (9.63 wt.%) atomic dispersion of bismuth in a fluorinated porous carbon network (Bi@CF) without aggregation.
• Bi-F-C sites demonstrated exceptional Li adsorption energy (-9.82 eV), indicating high lithiophilicity.
• The material exhibited remarkable electrochemical stability due to multiscale ion regulation.

Conclusions:

• The EPO-LDC strategy offers a scalable pathway for producing high-loading single-atom architectures.
• Precisely tailored coordination environments and atomic-scale lithiophilicity enhance electrochemical performance.
• This method provides a promising approach for advanced energy storage materials.