Ionic Conductivity of Solid Polymer Electrolytes for Dye-Sensitized Solar Cells
- Authors
- Kim, Joo Wan; Bae, Young Chan
- Issue Date
- Sep-2010
- Publisher
- WILEY
- Keywords
- DSSCs; polymer electrolytes; ionic conductivity model; PEO/LiI/I-2 system
- Citation
- JOURNAL OF APPLIED POLYMER SCIENCE, v.117, no.6, pp.3582 - 3587
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF APPLIED POLYMER SCIENCE
- Volume
- 117
- Number
- 6
- Start Page
- 3582
- End Page
- 3587
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/174204
- DOI
- 10.1002/app.32243
- ISSN
- 0021-8995
- Abstract
- We developed an ionic conductivity model of solid polymer electrolytes for dye-sensitized solar cells (DSSCs) based on the Nernst-Einstein equation in which the diffusion coefficient is derived from the molecular thermodynamic model. We introduced concentration-dependence of the diffusion coefficient into the model, and the diffusion coefficient was expressed by differentiating the chemical potential by concentration. The ionic conductivities of polymer electrolytes (PEO/LiI/I-2 system) were investigated at various temperatures and compositions. We prepared a set of PEO in which an EO : LiI mole ratio of 10 : 1 was kept constant for PEO.LiI.(I-2)(n) compositions with n = 0.02, 0.05, 0.1, 0.15, 0.2, and 0.3 (mole ratio of LiI : I-2). The ionic conductivities of the electrolytes were measured using a stainless steel/polymer-electrolyte/stainless steel sandwich-type electrode structure using alternating current impedance analysis. The values calculated using the proposed model agree well with experimental data.
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