Sustainable Supercapacitors Based on Polypyrrole-Doped Activated Biochar from Wood Waste Electrodes

The synthesis of high-performance carbon-based materials from biomass residues for electrodes has been considered a challenge to achieve in supercapacitor-based production. In this work, activated biochar prepared as the active electrode material supercapacitors (SCs), and an effective method explored boost its capacitive performance by employing polypyrrole (PPy) dopant. results physicochemical characterization data have demonstrated that PPy doping affects morphology, specific surface area, pore structure, incorporation functionalities on modified biochar. Biochar-PPy exhibited area 87 m2 g−1, while pristine 1052 g−1. SCs were assembled two sandwiched with PVA solid-state film electrolyte separator. device was characterized standard electrochemical assays indicated improvement 34% areal capacitance. wood delivered high capacitances 282 370 mF cm−2 at 5 mA cm−2, pure doped PPy, respectively, typical retention response 72% end 1000 cycles operation supercapacitor current density, indicating biochar-PPy-based devices higher energy density when compared devices.