Supercapacitor electrodes made of organic material

The ingredients are cellulose, conductive polymers, and bio-based charcoal from coconut, resulting in a durable, conductive, large surface area structure that can bind energy storage materials.

“Our goal is to build a prototype supercapacitor using paper materials by the end of the year,” said Jesper Edberg of partner research institute RISE. “We will also add electrochemically active materials that will allow paper to be used in battery applications. Batteries can store more energy than ultracapacitors, which will significantly increase energy density. Our previous studies have also shown that such batteries can be manufactured from forest-based materials. “

The center has set out to prove that electrode paper can be manufactured on a large scale with conventional technology in a proof of concept with industrial partners Agfa and Ahlstrom-Munksjö.

“It was manufactured on a regular basis

According to the center, each paper machine produces several rolls of 10 meters each. “Tests have shown that this paper has an energy storage capacity that is as efficient as a traditional supercapacitor.”

To make traditional paper, the elongated fibers are dispersed in water to form a homogeneous layer and remove the water. Cellulose combines materials into paper.

For e-paper, the fibers must first be coated with electrically active ingredients (conductive polymer and coconut charcoal), and these active ingredients must remain attached when the fibers are formed into the network. It will not be. It is necessary to mix the active ingredient in an appropriate amount. If it is too much, the paper will fall apart.

CDCRISE electric paper mixture before paper conversionIn a continuous process, a moist mixture of all components is distributed into a fine wire mesh through which water is evacuated (by vacuum).left). Press this layer to further remove moisture and strengthen the network. Then use heat to evaporate the remaining water before rolling the paper (Moreover).

Like RISE, the Digital Cellulose Center is collaborating with the Swedish research institute KTH and Linköping University on this project. Agfa supplies conductive polymers and Ahlstrom-Munksjö manages a French pilot plant.

Supercapacitor electrodes made of organic material

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