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Printable acid-modified corn starch as non-toxic, disposable hydrogel-polymer electrolyte in supercapacitors
Linköping University, Department of Science and Technology, Physics and Electronics. Linköping University, Faculty of Science & Engineering. Stuttgart Media Univ, Germany.
Stuttgart Media Univ, Germany.
Stuttgart Media Univ, Germany.
Linköping University, Department of Science and Technology, Laboratory of Organic Electronics. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0001-8845-6296
2019 (English)In: Applied Physics A: Materials Science & Processing, ISSN 0947-8396, E-ISSN 1432-0630, Vol. 125, no 7, article id 474Article in journal (Refereed) Published
Abstract [en]

Corn starch and citric acid, two low-cost and abundant materials, were used for establishing a novel screen printable hydrogel for printed electronics applications. Corn starch was modified with citric acid by melt-blending; the so obtained thermoplastic starch was ground to powder and added to a water-starch suspension. Ultrasonication was used to prepare hydrogels of different citric acid concentrations. The most promising hydrogel contained 10% citric acid by weight, provided an ionic conductivity of (2.30 +/- 0.07)mScm(-1) and appropriate rheological properties for screen and stencil printing. The hydrogel shows superb printability and prolonged stability against degradation. The corn starch hydrogel was used as printable gel polymer electrolyte in fully printed supercapacitors. The specific capacitance of the printed supercapacitor reached 54Fg(-1). The printable hydrogel-polymer electrolyte is easy to produce without in-depth chemical knowledge, is based on widely used and non-toxic materials, and may be used as a functional layer in other printed electronics applications such as printed batteries.

Place, publisher, year, edition, pages
SPRINGER HEIDELBERG , 2019. Vol. 125, no 7, article id 474
National Category
Materials Chemistry
Identifiers
URN: urn:nbn:se:liu:diva-158958DOI: 10.1007/s00339-019-2767-6ISI: 000472472500002OAI: oai:DiVA.org:liu-158958DiVA, id: diva2:1338152
Note

Funding Agencies|Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkoping University (Faculty Grant SFO Mat LiU) [2009 00971]; Knut and Alice Wallenberg Foundation; Swedish Foundation for Strategic Research; Swedish Research Council; VINNOVA (Digital Cellulose Center)

Available from: 2019-07-19 Created: 2019-07-19 Last updated: 2019-09-30

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The full text will be freely available from 2020-06-22 07:23
Available from 2020-06-22 07:23

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