Artículos de revistas
Electrochemical And Structural Characterization Of Polymer Gel Electrolytes Based On A Peo Copolymer And An Imidazolium-based Ionic Liquid For Dye-sensitized Solar Cells
Registro en:
Acs Applied Materials And Interfaces. , v. 1, n. 12, p. 2870 - 2877, 2009.
19448244
10.1021/am900596x
2-s2.0-77956437809
Autor
Freitas F.S.
Freitas J.N.D.
Ito B.I.
Paoli M.-A.D.
Nogueira A.F.
Institución
Resumen
Polymer electrolytes based on mixtures of poly(ethylene oxide-co-propylene oxide) and 1-methyl-3-propyl-imidazolium iodide (MPII) were investigated, aiming at their application in dye-sensitized solar cells (DSSC). The interactions between the copolymer and the ionic liquid were analyzed by infrared spectroscopy and 1H NMR. The results show interactions between the ether oxygen in the polymer and the hydrogen in the imidazolium cations. The ionic conductivities, electrochemical behaviors, and thermal properties of the electrolytes containing different concentrations of MPII were investigated. The electrolyte containing 70 wt % MPII presented the highest ionic conductivity (2.4 × 10 -3 S cm -1) and a diffusion coefficient of 1.9 × 10 -7 cm 2 s -1. The influence of LiI addition to the electrolytes containing different concentrations of MPII was also investigated. The DSSC assembled with the electrolyte containing 70 wt % MPII showed an efficiency of 3.84% at 100 mW cm -2. 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