Recycling spent dry cells into rGO/MnO <sub>2</sub> nanocomposites for advanced supercapacitor electrodes
Othai Saha, Md. Humayun Kabir, Md Mazharul Islam, Md. Sanwar Hossain, Muhammad Shahriar Bashar, Md Yeasin Pabel, Sabina Yasmin
Abstract
, and 80% capacitance retention after 1500 cycles. Kinetic analysis indicated a hybrid charge storage mechanism involving both capacitive and diffusion-controlled contributions, with capacitive behavior becoming more dominant at higher scan rates. Impedance measurements further confirmed low charge-transfer resistance and rapid ion diffusion. This sustainable approach for converting e-waste into advanced supercapacitor electrodes demonstrates the potential of hybrid charge storage mechanisms in delivering fast, reversible, and durable energy storage.
Topics & Concepts
SupercapacitorCapacitanceMaterials scienceCapacitive sensingNanocompositeGrapheneElectrodeEnergy storageDielectric spectroscopyElectrochemistryPower densityNanotechnologyNanostructureChemical engineeringNanoparticleHorizontal scan rateSpecific surface areaPorositySupercapacitor Materials and FabricationRecycling and Waste Management TechniquesMicrobial Fuel Cells and Bioremediation