The researchers proposed a new design for a green and simple-to-fabricate supercapacitor. It consists of a solid-state material based on nitrogen-doped graphene flake electrodes distributed in the NaCl-containing hydrogel electrolyte. This structure is sandwiched between two single-walled carbon nanotube film current collectors, which provides stretchability. Hydrogel in the supercapacitor design enables compact packing and high energy density and allows them to use the environmentally friendly electrolyte.
The scientists managed to improve the volumetric capacitive performance, high energy density and power density for the prototype over analogous supercapacitors described in previous research. "We fabricated a prototype with unchanged performance under the 50% strain after a thousand stretching cycles. To ensure lower cost and better environmental performance, we used a NaCl-based electrolyte. Still the fabrication cost can be lowered by implementation of 3-D printing or other advanced fabrication techniques," concluded Skoltech professor Albert Nasibulin.
As the use of coal, petroleum and natural gas expanded, the United States became less reliant on wood
Explore furtherEvgeniia Gilshtein et al. Superior environmentally friendly stretchable supercapacitor based on nitrogen-doped graphene/hydrogel and single-walled carbon nanotubes, Journal of Energy Storage (2020). DOI: 10.1016/j.est.2020.101505
Provided by Skolkovo Institute of Science and Technology
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Water wheels were once used to generate power. Water is one of the oldest power generators. You can work with your kids to help them build one at home. This is a straightforward but efficient way to explain how water can create power, even if the wheels are not the most conventional method. They’re so simple that you can easily make them with things from around the house. Even preschoolers would love to be involved.