Influence of Separator and Electrode Thickness on Cell Resistance in Energy Storage Devices based on Polypyrrole-Cellulose Composites
2014 (English)In: GradSAM21 workshop 2014: Graduate School of Advanced Materials for the 21st Century, 2014Conference paper, Poster (Other academic)
The next-generation electronic industry requires access to inexpensive, flexible, light-weight and environmentally friendly energy storage devices . Consequently, a lot of research has been directed toward producing versatile and flexible materials as a complement to the materials used in contemporary batteries and supercapacitors. Electroactive polymers represent an attractive alternative and electronically conducting polymers have hence received considerable interest as it is well-known that these materials can be used to manufacture all-polymer-based batteries and supercapacitors . The performance of such energy storage devices is, however, ultimately limited by the resistance of the cell . One important aspect is therefore to consider the cell resistance when optimizing the performance and cell design.
Our recent activities have shown that a flexible and highly porous cellulose and polypyrrole composite, obtained by polymerizing pyrrole on cellulose from the Cladophora sp. algae, can be used as paper-based electrode materials and together with an aqueous salt solution form an environmentally friendly charge storage device [4, 5]. The cellulose-polypyrrole-based device proved to cycle for thousands of cycles without significant loss of capacity even at high charge and discharge rates.
In the present work, the cell resistances of cellulose-polypyrrole-based charge storage devices are investigated, and the influence of electrode material and separator thickness are examined. The effect of absorption of electrolyte in the separator compared to bulk solutions of electrolyte, and the contact resistances between current collectors and the composite are discussed, as well as the possibilities of designing inexpensive all-organic energy storage devices with promising performance regarding cycling stability, rate capability and cell resistance.
Place, publisher, year, edition, pages
Engineering, Energy Storage
Research subject Engineering Science with specialization in Nanotechnology and Functional Materials
IdentifiersURN: urn:nbn:se:uu:diva-237219OAI: oai:DiVA.org:uu-237219DiVA: diva2:767221
GradSAM21 workshop, February 5, 2014, Uppsala, Sverige