Hemp Makes Better Supercapacitor Electrodes
Mitlin decided to test hemp bast fiber’s unique cellular structure to see if it could produce graphene-like carbon nanosheets. Hemp fiber waste was pressure under pressure at 180 °C for 24 hours. The resulting carbonized material was treated with potassium hydroxide and then heated to temperatures as high as 800 °C, resulting in the formation of uniquely structured nanosheets. Testing of this material revealed that it discharged 49 kW of power per kg of material — nearly triple what standard commercial electrodes supply, 17 kW/kg.