Ionic conductivity enhancement in PEO:CuSCN solid polymer electrolyte by the incorporation of nickel-chloride
Artikel i vetenskaplig tidskrift, 2015

© 2015 Elsevier B.V. All rights reserved. Copper-ion based solid polymer electrolytes exhibit interesting electrochemical properties, environmental stability and lower fabrication cost compared to lithium ion based systems. Although, poly(ethylene oxide)(PEO)-based solid polymer electrolytes have been extensively studied, those incorporating copper salts have not been explored much. One major drawback in these electrolytes is the low ionic conductivity at room temperature. In this work, we attempted to enhance the ionic conductivity of PEO 9 CuSCN polymer electrolyte by the incorporation of NiCl 2 . Incorporation of 10 wt% NiCl 2 showed the highest conductivity enhancement with almost two orders of magnitude increase. The ionic conductivity value at 30 °C increased from 3.1 × 10- 9 S cm- 1 for the NiCl 2 -free electrolyte to 1.8 × 10- 7 S cm- 1 for the 10 wt% NiCl 2 incorporated electrolyte. This was associated with a significant reduction in T g by about 30 °C from - 53 °C for PEO 9 CuSCN to - 83 °C for PEO 9 CuSCN + 10 wt% NiCl 2 , indicating an increased segmental flexibility of the polymer chains for NiCl 2 added electrolyte.

Ionic conductivity enhancement

Copper salts

Glass transition temperature

PEO based polymer electrolytes

Författare

K. Vignarooban

University of Peradeniya

University of Jaffna

M.A.K.L. Dissanayake

Chalmers, Teknisk fysik, Fasta tillståndets fysik

Ingvar Albinsson

Göteborgs universitet

Bengt-Erik Mellander

Chalmers, Teknisk fysik, Nukleär teknik

Solid State Ionics

0167-2738 (ISSN)

Vol. 278 177-180

Drivkrafter

Hållbar utveckling

Styrkeområden

Energi

Materialvetenskap

Ämneskategorier

Atom- och molekylfysik och optik

DOI

10.1016/j.ssi.2015.06.014