rGO–CMC fiber supercapacitors with core-sheath structure manufactured by coaxial extrusion printing
Date
2021-08
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Springer Nature
Abstract
Fiber-shaped supercapacitors are attractive as an energy storage unit due to their excellent flexibility. However, fabricating robust fibers with large yields remains a challenge. In this work, we prepare flexible core-sheath fibers via coaxial extrusion printing. Carboxymethylcellulose sodium salt (CMC) slurry with controlled rheological properties is extruded from the outer channel, while the graphene oxide (GO) slurry is extruded from the inner channel simultaneously. The followed freeze-drying process protects GO sheets from agglomeration, providing more efficient chemical reduction. The reduced GO (rGO) sheets are separated and expanded to fill in the CMC sheath, which eliminates the delamination between the CMC sheath and rGO core. We study the influences of the freeze-drying process on the fiber microstructures, and explore the slurry design, fiber quality, reduction condition, and electrochemical performance. The fabrication method allows scalable manufacturing of the core-sheath electrodes and fiber-shaped supercapacitors with more efficient conductive networks.
Description
This is the Accepted Manuscript of the following article: Gao, Y., Ding, J. rGO–CMC fiber supercapacitors with core-sheath structure manufactured by coaxial extrusion printing. Journal of Materials Research (2021), which has been published in final form at https://doi.org/10.1557/s43578-021-00357-5. This manuscript version is made available under the CC BY-NC-ND 4.0 license
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Journal Article
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Citation
Gao, Y., Ding, J. rGO–CMC fiber supercapacitors with core-sheath structure manufactured by coaxial extrusion printing. Journal of Materials Research (2021). https://doi.org/10.1557/s43578-021-00357-5