Hierarchically Porous Graphitic Carbon with Simultaneously High Surface Area and Colossal Pore Volume Engineered via...

Area of Science:

• Materials Science
• Nanotechnology
• Electrochemistry

Background:

• Developing hierarchical porous carbon (HPC) materials with high surface area and pore volume simultaneously is challenging.
• Graphitic carbon materials with ordered structures often exhibit trade-offs between surface area and pore volume.

Purpose of the Study:

• To engineer tunable HPC materials across micro-, meso-, and macroporous scales.
• To fabricate a graphitic HPC material (HPC-G) with exceptionally high surface area and pore volume.
• To explore the potential of HPC-G in supercapacitor electrodes and oil adsorption.

Main Methods:

• Utilized a synthesis strategy involving ice templating.
• Employed ice templating as a synergistic vehicle for mesoporous hard template loading.
• Engineered micro-, meso-, and macroporous structures within the graphitic carbon.

Main Results:

• Fabricated HPC-G with surface area >2500 m²/g and total pore volume >11 cm³/g.
• Achieved a mesopore volume of up to 7.53 cm³/g, the highest reported for porous carbons.
• Demonstrated the material's suitability for supercapacitor electrodes and oil adsorption.

Conclusions:

• The developed synthesis strategy enables the creation of HPC materials with competing textural properties.
• HPC-G exhibits superior performance in applications requiring high surface area and/or large pore volume.
• The design scheme is applicable to various fields including electrochemical systems, sorbents, and catalyst supports.