Boron-double-ring sheet, fullerene, and nanotubes: potential hydrogen storage materials

Area of Science:

• Materials Science
• Condensed Matter Physics
• Nanotechnology

Background:

• Boron atoms can form diverse nanostructures analogous to carbon allotropes like graphene and carbon nanotubes.
• Novel boron structures, including sheets, fullerenes, and nanotubes, are being explored for unique properties.

Purpose of the Study:

• To investigate the structural, electronic, and hydrogen storage properties of novel boron nanostructures.
• To explore the potential of lithium-decorated boron nanostructures for hydrogen storage applications.

Main Methods:

• Utilizing density functional theory (DFT) to model boron sheets, cages, and nanotubes.
• Analyzing the stability, electronic structure, and hydrogen adsorption capacities of these nanostructures.

Main Results:

• The ground state of boron sheets is found to be metallic and planar.
• Stable boron nanotubes, derived from rolling boron sheets, are metallic.
• Lithium-decorated boron sheets and nanotubes demonstrate significant hydrogen storage capabilities, with Li-decorated nanotubes reaching 12.309 wt%.

Conclusions:

• Boron nanostructures possess unique electronic properties and structural stability.
• Lithium decoration significantly enhances the hydrogen storage capacity of boron nanostructures.
• Boron-based materials, particularly nanotubes, are promising candidates for future hydrogen storage technologies.