Journal
ELECTROCHIMICA ACTA
Volume 55, Issue 17, Pages 4976-4981Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2010.03.106
Keywords
Atom transfer radical polymerization (ATRP); Graft copolymer; Polymer electrolyte; Dye-sensitized solar cell (DSSC); Conductivity
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Funding
- Korea Government (MEST) through the Korea Center for Artificial Photosynthesis (KCAP) located in Sogang University [NRF-2009-C1AAA001-2009-0093879]
- Active Polymer Center for Pattern Integration [R11-2007-050-00000-0]
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An amphiphilic graft copolymer, i.e. poly(vinyl chloride)-graft-poly(oxyethylene methacrylate) (PVC-g-POEM) comprised of a PVC backbone and POEM side chains was synthesized via atom transfer radical polymerization (ATRP) and complexed with a salt for dye-sensitized solar cell (DSSC) applications. The coordinative interactions and structural changes of polymer electrolytes were investigated using FT-IR spectroscopy, wide angle X-ray scattering (WAXS) and differential scanning calorimetry (DSC). Small angle X-ray scattering (SAXS) and transmission electron microscopy (TEM) revealed that the d-spacing between PVC domains was significantly increased upon the introduction of metal salt, ionic liquid and oligomer, indicating their selective confinement in the hydrophilic POEM domains. The ion-conducting POEM domains were well interconnected, resulting in high ionic conductivity (similar to 10(-4) S/cm at 25 degrees C) and energy conversion efficiency (similar to 5.0% at 100 mW/cm(2)) in the solid-state. (C) 2010 Elsevier Ltd. All rights reserved.
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