New electrolyte for electrochromic devices

• Autorzy: Kucharski M. , Łukaszewicz T. , Mrozek P.
• Języki publikacji: EN

Abstrakty

EN

The paper presents the results of the research on a new polymer-gel electrolyte for electrochromic devices. In the performed studies, various electrolytes were used. They all contained an ionic conductor, a matrix of polymer gel and organic solvent or mixture of polar organic solvents. The electrolyte which had the best properties contained 8% LiCF₃SO₃ as an ionic conductor, a matrix consisting of two polymers: 10% PMMA, 6% PEO, and a mixture of the following two polar organic solvents: 38% propylene carbonate and 38% ethylene carbonate. The high conductivity (σ = 4.8 mS/cm), which provides easy deposition in layers, gives stability (resistance) in time and high transmittance value of radiation in the visible region makes the electrolyte very useful for electrochromic devices. A seven-layer electrochromic device with this new gel electrolyte was assembled according to the following formula: glass ₁ /ITO/WO₃/electrolyte/BP/ITO/glass ₂, where ITO was an indium-tin film oxide, WO₃ was an electrochemically deposited tungsten oxide film and BP an electrochemically deposited film of prussian blue. The density of the current flowing through the unit and the transmittance at the wavelength ʎ = 550 nm are given in the paper as a function of sinusoidal voltage. The transmittance varies from 70–50% (coloured) to 25–10% (for fully bleached) in the range of visible radiation and the colouration efficiency is high (above 100 cm²/C). These results are considerably better than those reported in the other similar studies.

Słowa kluczowe

EN

gel electrolyte; conductivity; lithium salt; based polymer; polar organic solvent; electrochromic devices; colouration efficiency

• Wydawca: Stowarzyszenie Elektryków Polskich ; Polska Akademia Nauk ; Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
• Czasopismo: Opto-Electronics Review
• Rocznik: 2004
• Tom: Vol. 12, No. 2
• Strony: 175--180
• Opis fizyczny: Bibliogr. 12 poz., wykr.

Twórcy

autor

Kucharski M.

• Department of Chemistry, Technical University of Białystok, 29 Zamenhofa Str., 15-351 Białystok, Poland

autor

Łukaszewicz T.

• Institute of Mathematics and Physics, Technical University of Białystok, 45A Wiejska Str., 15-351 Białystok, Poland

autor

Mrozek P.

• Institute of Mathematics and Physics, Technical University of Białystok, 45A Wiejska Str., 15-351 Białystok, Poland

Bibliografia

• 1. L. Su, J. Fang, and Z. Lu, “All-solid-state electrochromic window of electrodeposited WO3 and prussion blue with poly(ethylene oxide) gel electrolyte”, Jpn. J. Appl. Phys. 36, 5747–5750 (1997).
• 2. L. Su, H. Wang, and Z. Lu, “All solid-state electrochromic smart window of electrodeposited WO3 and prussion blue film with PVC gel electrolyte”, Supramolecular Science 5, 657–659 (1998).
• 3. L. Su, Z. Xiao, and Z. Lu, “All solid-state electrochromic window of electrodeposited WO3 and prussion blue film with PVC gel electrolite”, Thin Solid Films 320, 285–289 (1997).
• 4. L. Su, H. Wang, and Z. Lu, “All-solid-state electrochromic window of prussion blue and electrodeposited WO3 film with poly(ethylene oxide) gel electrolyte”, Materials Chemistry and Physics 56, 266–270 (1998).
• 5. D. Dini, F. Decker, and E. Masetti, J. Appl. Electrochem. 26, 647 (1996).
• 6. L. Su, Z. Xiao, and Z. Lu, “All solid-state electrochromic device with PMMA gel electrolyte”, Materials Chemistry and Physics 52, 180–183 (1998).
• 7. S.S. Sekhon, P. Pradeep, and S.A. Agnihotry, in Solid State Ionics: Science and Technology, edited by B.V.R. Chowdari et al., p. 217, Word Scientific, Singapure, 1998.
• 8. SS. Sekhon, M. Deepa, and S.A. Agnihotry, “Solvent effect on gel electrolytes containing lithium salts”, Solid State Ionics 136/137, 1189–1192 (2000).
• 9. O. Bohnke, G. Frand, M. Rezrazi, C. Rousselot, and C. Truche, Solid State Ionics 66, 97–105 (1993).
• 10. S.A. Agnihotry, P. Pradeep, and S.S. Sekhon, “PMMA based gel electrolyte for EC smart windows”, Electrochimica Acta 44, 3121–3126 (1999).
• 11. S.A. Agnihotry, S. Nidhi, P. Pradeep, and S.S. Sekhon, “Li+ conducting gel electrolyte for electrochromic windows”, Solid State Ionics 136/137, 573–576 (2000).
• 12. S.S. Sekhon, N. Arora, and S.A. Agnihotry, “PAN-based gel electrolite with lithium salts”, Solid State Ionic 136/137, 1201–1204 (2000).