Interfacial Phenomena Governing Performance of Graphene Electrodes in Aqueous Electrolyte.

ABSTRACT: There is evidence of the presence of intercalated water between graphene and the substrate in electronic devices. However, a proper understanding of the impact of this phenomenon, which causes important limitations for the optimization of graphene-based devices operating in aqueous electrolytes, is missing. We used graphene-based electrodes on insulating and conducting substrates to evaluate the impact of intercalated water by combining experimental techniques with numerical simulations. Results show that the capacitance of the conductive substrate/graphene electrodes is significantly higher than that of the insulating substrate/graphene ones. Meanwhile, Raman spectroscopy demonstrates that graphene charge modulation with the applied potential is independent of the substrate conductivity.

SUBMITTER: Delga-Fernandez M 

PROVIDER: S-EPMC11421073 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature