Electrochemical co-deposition of metal oxide/graphene nanocomposites for micro-supercapacitor
Publicerad
Författare
Typ
Examensarbete för masterexamen
Master's Thesis
Master's Thesis
Modellbyggare
Tidskriftstitel
ISSN
Volymtitel
Utgivare
Sammanfattning
Micro-supercapacitors (MSCs) have gained significant attention in both academia
and industry due to their excellent cycling stability, high power density, and long
lifespan. They are widely used in miniaturized electrochemical energy storage devices
and hold great potential for applications in portable electronics, wireless sensors,
and other related fields. Efforts have been made to simplify the fabrication
techniques of MSCs from the synthesis of electrode materials, electrode structure
design, to the deposition process. However, there still lacks of a cost-effective and
reliable manufacturing process to combine the multiple fabrication steps into a single
operation. Hereby, this thesis work proposes an electrochemical co-deposition
approach to make graphene and metal oxide nanocomposites layer in a single step
to achieve high performance MSCs. Selective cathodic deposition was used to coat
graphene-wrapped MnO2 and Fe2O3 nanoparticles on target MSCs patterns. Various
parameters, including the output signal, coating time, and concentration of metal
salt precursor were examined to verify the optimal deposition condition. SEM, Raman,
and XPS analyses were used to characterize the resulting hybrid materials.
Additionally, the relative electrochemical performance of the MSCs devices with
either liquid or solid electrolytes were evaluated. The result of this study offer an alternative
approach for the one-step fabrication of graphene-related nanocomposites,
specifically designed for miniaturized supercapacitors application.
Beskrivning
Ämne/nyckelord
Graphene, Micro-supercapacitor, Metal oxide, Electrochemical deposition