Pigment-cellulose nanofibril composite and its application as a separator-substrate in printed supercapacitors

Katariina Torvinen (Corresponding Author), Suvi Lehtimäki, Janne T. Keränen, Jenni Sievänen, Jari Vartiainen, Erkki Hellén, Donald Lupo, Sampo Tuukkanen

Research output: Contribution to journalArticleScientificpeer-review

26 Citations (Scopus)


Pigment-cellulose nanofibril (PCN) composites were manufactured in a pilot line and used as a separator-substrate in printed graphene and carbon nanotube supercapacitors. The composites consisted typically of 80% pigment and 20% cellulose nanofibrils (CNF). This composition makes them a cost-effective alternative as a substrate for printed electronics at high temperatures that only very special plastic films can nowadays stand. The properties of these substrates can be varied within a relatively large range by the selection of raw materials and their relative proportions. A semi-industrial scale pilot line was successfully used to produce smooth, flexible, and nanoporous composites, and their performance was tested in a double functional separator-substrate element in supercapacitors. The nanostructural carbon films printed on the composite worked simultaneously as high surface area active electrodes and current collectors. Low-cost supercapacitors made from environmentally friendly materials have significant potential for use in flexible, wearable, and disposable low-end products.
Original languageEnglish
Pages (from-to)1040-1047
JournalElectronic Materials Letters
Issue number6
Publication statusPublished - 2015
MoE publication typeA1 Journal article-refereed


  • cellulose nanofibrils (CNF)
  • graphene
  • carbon nanotubers
  • supercapacitors
  • separator
  • substrate


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