News

The power paper

Greentech power paper shows promise of storing solar energy A new pilot study from the Digital Cellulose Center on a greentech power paper shows promise for high-capacity storage of renewable energy. The electronic paper is completely made of organic material and the first testing’s show that the energy storage capacity is as efficient as conventional technology.“The power papers energy storage capacity showed fantastic results in our pilot study, with the possibility of storing renewable energy on a large scale,” says Jesper Edberg, researcher at RISE and scientific leader at the Digital Cellulose Center. “Green electronics, like the power paper, will contribute greatly to a sustainable, digital society." Greentech power paper – a key to a fossil-free society The transition to a fossil-free society needs to go faster. Renewable energy such as solar and wind power is a part of the transition, however it lacks efficient methods of energy storage. One of the biggest challenges for renewable energy is storing energy on a large scale to fully utilize the energy that is produced. Researchers at the Digital Cellulose Center believe that an electrode paper with the ability for high-capacity energy storage will be the solution. The electrode paper, also called the power paper, has been a research area for many years. Jesper Edberg is one of the leading scientists in the area. Based on the previous development of the power paper by the research teams from RISE, KTH and Linköping University, the team at Digital Cellulose Center have refined the research and process for creating power electronics with organic materials.   Large scale renewable energy storage The first prototype of the power paper was fifteen centimeters in diameter, and a tenth of a millimeter thick. It had the ability to be charged with electricity within a few seconds and it could be reused hundreds of times. The newly re-developed power paper is made with other materials than before, it is completely composed of organic materials and has more efficient properties for high-capacity energy storage. A pilot study was conducted by the Digital Cellulose Center’s researchers and industry partners Agfa and Ahlstrom-Munksjö. The purpose was to test and verify if the power paper can be produced on a large scale. The biggest challenge was to scale up the process and take the production from the gram scale to a kilogram scale. The test was successful, and the paper was manufactured in regular paper machines, with several paper roles produced, ten meters each. The paper can be used as electrodes in supercapacitors in order to test the energy storage capacity. The testing’s showed that the paper has an as efficient energy storage capacity as conventional supercapacitors.   The future of the power paper “Our goal is to use the paper material to build prototype supercapacitors before the end of the year”, says Jesper Edberg. “In the future, we also plan to add electrochemically active materials that...

Laser Induced Graphene from Wood Ink – Published!

A new publication by RISE (Research Institutes of Sweden) researchers within the Digital Cellulose Center has been released online in the journal npj Flexible Electronics. The report outlines how to create an electrically conducting material from a wood-based ink. The ink is environmentally friendly and sustainable being composed of lignin and cellulose from wood and dissolved in water. After the ink is deposited via screen-printing a laser is used to carbonize the ink into electrically conductive carbon that can be incorporated into functional components such as a humidity sensor. The article can be found here: https://www.nature.com/articles/s41528-020-0080-2

Grey scale and paper displays – Manuscript published!

Researchers from Linkoping University and RISE Acreo have collaborated on a project to produce greyscale and paper displays using conductive polymers and a UV-patterning technique. The displays rely on the electrochromic properties of the materials meaning the display will change with the onset of an applied voltage. The authors use a vapor synthesis technique and photomasks to embed images into conductive polymers which appear and disappear upon activation of the display. The researchers use this phenomenon to produce dual image electrochromic displays. Finally, a proof of concept paper display was presented, hinting at the future of this technology. The manuscript was funded partially by the Digital Cellulose Center project under Theme 4. The manuscript features on the cover of the Polymers journal and can be found at the following link: https://www.mdpi.com/2073-4360/11/2/267

Digital Cellulose Center

The Digital Cellulose Center (DCC) is one of eight new competence centers recently supported by VINNOVA. RISE, LiU, RISE Bioeconomy and KTH together with ten corporations will conduct world-class research in the center in an area vital to Swedens future competitiveness. RISE Acreo is the main applicant and will co-ordinate the DCC. In the VINNOVA competence center programme, universities, research institutes, corporations and public agencies will collaborate on research in an area vital to Swedens future competitiveness. The investment is part of the strategic partnership program initiative run by the the Swedish government. RISE Acreo is the main applicant and will act as co-ordinator for the Digital Cellulose Center, established together with RISE Bioeconomy (former Innventia), Linköping university (Campus Norrköping), KTH Royal Institute for Technology and a number of different corporations. The purpose of the DCC is to make cellulose based products an integrated part of the digital society. The DCC is granted 36 MSEK from VINNOVA until the 2022 when an evaluation will take place to determine if the center will be funded for another five years. The VINNOVA funding will be matched by the academic partners and corporations, making the total funding for the project 108 MSEK for the first five years.