Single-walled carbon nanotubes (SWCNT or SWNT) are all composed of carbon atoms. The geometric structure can be regarded as a single layer of graphene curled, and the structure determines the properties. Therefore, single-walled carbon nanotubes have excellent electronic, mechanical, and mechanical properties. Performance, single-walled carbon nanotubes also have chemical stability.

Single-wall carbon tubes can be used for large-capacity super capacitors:

The amount of energy stored in an electric double layer capacitor is determined by the effective specific surface area of the electrode plates of the capacitor. Because the single-walled carbon nanotubes has the largest specific surface area and good conductivity, the electrode prepared by the carbon nanotubes can significantly increase the capacitance of the electric double layer capacitor.

According to the structural characteristics of carbon nanotubes, it has significant adsorption to both liquids and gases. Carbon nanotubes store hydrogen by utilizing the characteristics of physical adsorption or chemical adsorption of hydrogen in materials with large specific surface area and pore structure.