Recycling spent dry cells into rGO/MnO₂ nanocomposites for advanced supercapacitor electrodes.

ABSTRACT: Electronic waste (e-waste) poses a pressing environmental challenge, with improper disposal leading to pollution, resource depletion, and ecosystem damage. In this study, we demonstrate a sustainable strategy to repurpose e-waste into high-performance supercapacitor materials. A reduced graphene oxide/manganese dioxide (rGO/MnO₂) nanocomposite was synthesized entirely from spent dry cells through a cost-effective process. Structural and morphological analyses confirmed a porous nanostructure with a large accessible surface area, enabling efficient charge storage, rapid ion transport, and favorable electrochemical reversibility. Electrochemical testing in 1 M KOH revealed excellent performance, with a specific capacitance of 532 F g^-1 at 1 A g^-1, an energy d

SUBMITTER: Saha O 

PROVIDER: S-EPMC12573417 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature