Swiss roll nanomembranes with controlled proton diffusion as redox micro-supercapacitors

Area of Science:

• Materials Science
• Electrochemistry
• Nanotechnology

Background:

• Micro-supercapacitors are crucial for miniaturized electronic devices.
• Understanding proton diffusion is key to optimizing energy storage performance.
• Electrolyte/electrode interface charge transfer significantly impacts device efficiency.

Purpose of the Study:

• To demonstrate a novel redox Swiss roll micro-supercapacitor.
• To investigate the effect of active layer placement on proton diffusion.
• To evaluate the performance and interfacial properties of the micro-supercapacitor.

Main Methods:

• Fabrication of a multilayered nanomembrane.
• Rolling the nanomembrane into a Swiss roll architecture.
• Positioning the electrochemical active layer on the inner or outer surface.
• Electrochemical characterization to assess performance and charge transfer.

Main Results:

• Successful fabrication of the redox Swiss roll micro-supercapacitor.
• Demonstrated high performance in terms of capacity and device lifetime.
• Observed different proton diffusion behaviors based on active layer placement.
• Provided insights into charge transfer dynamics at the electrolyte/electrode interface.

Conclusions:

• The redox Swiss roll micro-supercapacitor is a promising microscale power source.
• Active layer configuration influences proton diffusion and device performance.
• This architecture facilitates the study of interfacial charge transfer mechanisms.