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Buckling Structured Stretchable Pseudocapacitor Yarn.

Duck Weon Lee¹, Jung Han Lee², Nam Ki Min³

¹Department of Ray H. Baughman Lab, Jiangnan graphene research institute, No.6 XiangYun Road, Wujin Economical Development Zone, Jiangsu, 213149, China.

Scientific Reports

|September 22, 2017

Summary

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Researchers developed stretchable yarn-shaped pseudocapacitors using carbon nanotubes and metal oxides. This novel design maintains electrical capacity even after significant stretching, enabling potential use in wearable electronics.

Area of Science:

Materials Science
Electrochemistry
Nanotechnology

Background:

Developing flexible and stretchable energy storage devices is crucial for wearable electronics.
Traditional electrode materials often lack the mechanical robustness required for high-strain applications.

Purpose of the Study:

To create a cable-type stretchable electrochemical pseudocapacitor yarn.
To investigate the performance of metal oxide nanopowders on a stretchable substrate.
To demonstrate the potential for wearable energy storage.

Main Methods:

A novel dry painting method was employed to adhere metal oxide nanopowders (MnO2 and RuO2) to multi-walled carbon nanotube (MWCNT) sheets.
A stretchable styrene-ethylene/butylene-styrene (SEBS) elastomer served as the core support.

Related Experiment Videos

The pseudocapacitor yarn featured a layered structure of MWCNT sheets and metal oxides with a porous buckling structure.

Main Results:

The developed yarn-type pseudocapacitor exhibited a specific capacitance of 25 F/g.
The unique porous buckling structure remained intact even after stretching up to 200% strain.
The device maintained its electrical capacity under significant mechanical deformation.

Conclusions:

The dry painting method successfully created robust, stretchable pseudocapacitor yarns.
These stretchable pseudocapacitors show promise for integration into wearable electronic devices.
The developed technology offers a new avenue for flexible and durable energy storage solutions.