Nanocellulose has become one of the most attractive matrix materials for flexible supercapacitors, owing to high surface area, good mechanical properties and environmental friendliness. Herein, we developed electrode with capacitance flexibility through in-situ synthesis polypyrrole (PPy) in TEMPO-oxidized cellulose nanofibril (TOCN)/sulfonated carbon nanotubes (SCNT) composite hydrogels. The T...