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Stretchable sodiumion battery electrodes made using sugar cubes

center_img Citation: Stretchable sodium-ion battery electrodes made using sugar cubes (2017, April 25) retrieved 18 August 2019 from https://phys.org/news/2017-04-stretchable-sodium-ion-battery-electrodes-sugar.html © 2017 Phys.org This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only. The scientists, led by Guihua Yu at the University of Texas at Austin, have published a paper on the new stretchable batteries in a recent issue of Advanced Materials.By starting with sugar cubes, the researchers were able to obtain the size, shape, and porosity needed for high-performance battery electrodes. The researchers first placed ordinary sugar cubes on top of a polymer gel in a dish. After the dish was placed in a vacuum, heated in an oven, and washed, the sugar was dissolved away and the polymer gel took its place, resulting in stretchable polymer sponges. The pores of the polymer sponges were then filled with a conductive graphene-based solution to create “sponge electrodes,” which the researchers achieved by immersing the sponges in the solution and squeezing them several times to soak it up.As the researchers explained, the sponge’s porous architecture provides a combination of stretchability, mechanical strength, fast sodium-ion transport, and large storage capacity. Tests showed that the full battery can be stretched to 50% beyond its original length, and that the strain is limited by the intrinsic properties of the polymer material. The researchers expect that modifying the polymer or developing a new nanoarchitectured elastomer could further increase the stretchability of the battery. More information: Hongsen Li et al. “An All-Stretchable-Component Sodium-Ion Full Battery.” Advanced Materials. DOI: 10.1002/adma.201700898last_img

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