The performance of sulphur doped activated carbon supercapacitors prepared from waste tea.

The pore structure, high surface area and good conductivity are the key properties for the electrochemical double layer based supercapacitors. The activated carbons were produced from the waste tea, utilising microwave pretreatment with HPO and activation at 450°C. Sodium thiosulfate pentahydrate (NaSO·5HO) was used as sulphur doping agent at 800°C to enhance conductivity of the activated carbons.