Effect of calendering and coating formulations on conductivity in paper-based electrodes

Sven Forsberg, Vinay Kumar, Ann Christine Engstrom, Maristiina Nurmi, Christina Dahlstrom, Martti Toivakka

Research output: Chapter in Book/Conference proceedingConference contributionScientificpeer-review

1 Citation (Scopus)

Abstract

The paper industry together with the printing industry has the ability to produce large areas. In many technologies, for example solar-cells, displays and energy storage, there is a need for at least one electrically conductive electrode in order to make a device. We have investigated a system of conductive coatings, containing nano-graphite, graphene and a conductive carbon black to make "paper" electrodes. Cellulose nano-fibrils were used as a binder in the coatings. Rheological measurements of the system show strong interactions, giving coating colours at low solids content processable viscosities and resulting in coatings with high porosities. This was confirmed from SEM images. Conductive carbon black is the standard solution to get high conductivity in graphitic battery electrodes. Our intention was to fill the graphene/nano-graphite coatings with small conductive carbon black particles to produce denser coatings with higher conductivity. However, there was a decrease in electrical conductivity rather than the desired increase. Calendering, a common papermaking technology, gave on the other hand a very positive effect on the electrical conductivity. Calendered samples had resistance as low as 1.6 Ohm/sq at 15 gsm coat weight.

Original languageEnglish
Title of host publication14th TAPPI Advanced Coating Symposium 2016
PublisherTAPPI Press
Pages84-87
Number of pages4
ISBN (Electronic)9781510877658
Publication statusPublished - 2016
MoE publication typeA4 Article in a conference publication
Event14th TAPPI Advanced Coating Symposium 2016 - Stockholm, Sweden
Duration: 4 Oct 20166 Oct 2016

Publication series

Name14th TAPPI Advanced Coating Symposium 2016

Conference

Conference14th TAPPI Advanced Coating Symposium 2016
CountrySweden
CityStockholm
Period04/10/1606/10/16

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