High-Performance and High-Voltage Supercapacitors Based on N-Doped Mesoporous Activated Carbon Derived from Dragon Fruit Peels
Dayakar Gandla, Xudong Wu, Fuming Zhang, Chongrui Wu, Daniel Q. Tan
Abstract
, respectively, in organic electrolytes. The cell also exhibits a significantly higher cycle life (109% capacitance retention) after 5000 GCD cycles at the working voltage of ≥3.5 V than commercial YP-50 AC (∼60% capacitance retention). The larger Debye length of the diffuse ion layer permitted by the mesopores can explain the higher voltage window, and the polar N-doped species in the dfAC enhance capacitance and ion transport. The results endow a new path to design high-capacity and high-working voltage EDLCs from eco-friendly and sustainable biomass materials by properly tuning their pore structures.
Topics & Concepts
SupercapacitorActivated carbonMesoporous materialMaterials scienceDopingCarbon fibersVoltageChemical engineeringNanotechnologyChemistryOptoelectronicsElectrodeComposite materialCapacitanceElectrical engineeringEngineeringOrganic chemistryComposite numberAdsorptionCatalysisPhysical chemistrySupercapacitor Materials and FabricationConducting polymers and applicationsElectrospun Nanofibers in Biomedical Applications