Plasticizing Effect of K+ Ions and Succinonitrile on Electrical Conductivity of [Poly(ethylene oxide)–Succinonitrile]/KI–I2 Redox-Couple Solid Polymer Electrolyte
- 7 June 2013
- journal article
- research article
- Published by American Chemical Society (ACS) in The Journal of Physical Chemistry B
- Vol. 117 (24) , 7465-7471
Abstract
The plasticizing effect of the K+ ions and succinonitrile on the electrical conductivity of a new redox-couple solid polymer electrolyte system, (1 – x)[0.5poly(ethylene oxide):0.5succinonitrile]:x[0.9KI:0.1I2] with x = 0–0.2 in weight fraction, is reported. An increase of x resulted in an increase of the electrical conductivity (σ25°C) of the electrolyte. The electrolyte with x = 0.15 exhibited the highest σ25°C value, ∼7 × 10–4 S cm–1, and is referred to as the optimum conducting composition (OCC). In addition to an increase of the mobile ion concentration with increasing x, X-ray diffractometry, Fourier-transform infrared spectroscopy, polarized optical microscopy, UV–vis spectroscopy, and differential scanning calorimetry studies revealed a decrease of poly(ethylene oxide) crystallinity/an increase of ionic mobility, indicating the plasticizing effect of the K+ ions. Plasticizing and molecular diffusing properties of the succinonitrile further helped to improve the electrical conductivity of the electrolyte.Keywords
This publication has 37 references indexed in Scilit:
- Porphyrin-Sensitized Solar Cells with Cobalt (II/III)–Based Redox Electrolyte Exceed 12 Percent EfficiencyScience, 2011
- Dye-Sensitized Solar CellsChemical Reviews, 2010
- Recent research progress on polymer electrolytes for dye-sensitized solar cellsSolar Energy Materials and Solar Cells, 2009
- New insights into dye-sensitized solar cells with polymer electrolytesJournal of Materials Chemistry, 2009
- Solid polymer electrolytes: materials designing and all-solid-state battery applications: an overviewJournal of Physics D: Applied Physics, 2008
- Nanocrystalline Porous TiO2 Electrode with Ionic Liquid Impregnated Solid Polymer Electrolyte for Dye Sensitized Solar CellsJournal of Nanoscience and Nanotechnology, 2008
- Effects of compositions on properties of PEO–KI–I2 salts polymer electrolytes for DSSCSolid State Ionics, 2006
- Review of recent progress in solid-state dye-sensitized solar cellsSolar Energy Materials and Solar Cells, 2006
- Dye-sensitized solar cells based on composite solid polymer electrolytesChemical Communications, 2004
- Superionic solid: composite electrolyte phase – an overviewJournal of Materials Science, 1999