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Eriksson, Therese
Publications (2 of 2) Show all publications
Eriksson, T., Mindemark, J., Yue, M. & Brandell, D. (2019). Effects of nanoparticle addition to poly(epsilon-caprolactone) electrolytes: Crystallinity, conductivity and ambient temperature battery cycling. Electrochimica Acta, 300, 489-496
Open this publication in new window or tab >>Effects of nanoparticle addition to poly(epsilon-caprolactone) electrolytes: Crystallinity, conductivity and ambient temperature battery cycling
2019 (English)In: Electrochimica Acta, ISSN 0013-4686, E-ISSN 1873-3859, Vol. 300, p. 489-496Article in journal (Refereed) Published
Abstract [en]

It has previously been shown that nanoparticle additives can, in a simple way, significantly improve the ionic conductivity in solid polymer electrolyte systems with the semi-crystalline poly(ethylene oxide) (PEO) as a host material. It has been suggested that the improved ionic conductivity is a result of reduced degree of crystallinity and additional conductivity mechanisms occurring in the material. In this work, this principle is applied to another semi-crystalline polymer host: poly(epsilon-caprolactone) (PCL). This is a polymer with comparable properties (T-g, T-m, etc.) as PEO, and constitute a promising material for use in solid polymer electrolytes for lithium ion batteries. 15 wt% of the respective nanoparticles TiO2, Al2O3 and h-BN have been added to the PCL-LiTFSI solid polymer electrolyte in an attempt to increase the conductivity and achieve stable room temperature cyclability. The crystallinity, ionic conductivity and electrochemical properties were investigated by differential scanning calorimetry, electrochemical impedance spectroscopy and galvanostatic cycling of cells. The results showed that with an addition of 15 wt% Al2O3, the degree of crystallinity is reduced to 6-7% and the ionic conductivity increased to 6-7 x 10(-6) S cm(-1) at room temperature, allowing successful cycling of cells at 30 degrees C, while h-BN did not contribute to similar improvements. The effect of nanoparticles, however, differ significantly from previous observations in PEO systems, which could be explained by different surface-polymer interactions or the degree of ordering in the amorphous phases of the materials.

Place, publisher, year, edition, pages
PERGAMON-ELSEVIER SCIENCE LTD, 2019
Keywords
Li-battery, Solid polymer electrolyte, Polyester, Nanoparticle
National Category
Materials Chemistry Polymer Chemistry
Identifiers
urn:nbn:se:uu:diva-378621 (URN)10.1016/j.electacta.2019.01.117 (DOI)000458488200058 ()
Funder
EU, Horizon 2020, 685716The Swedish Foundation for International Cooperation in Research and Higher Education (STINT), CH2016-6753
Available from: 2019-03-11 Created: 2019-03-11 Last updated: 2019-03-11Bibliographically approved
Eriksson, T., Mindemark, J., Yue, M. & Brandell, D. (2018). Nanoparticle Additives in Poly(ε-Caprolactone)-Based Solid PolymerElectrolytes; Towards Lower Crystallinity and Higher Ionic Conductivity.. In: : . Paper presented at 16th International Symposium on Polymer Electrolytes (ISPE-16).
Open this publication in new window or tab >>Nanoparticle Additives in Poly(ε-Caprolactone)-Based Solid PolymerElectrolytes; Towards Lower Crystallinity and Higher Ionic Conductivity.
2018 (English)Conference paper, Poster (with or without abstract) (Refereed)
National Category
Materials Chemistry
Identifiers
urn:nbn:se:uu:diva-374614 (URN)
Conference
16th International Symposium on Polymer Electrolytes (ISPE-16)
Available from: 2019-01-22 Created: 2019-01-22 Last updated: 2019-01-22
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