Solid electrolytes for electrochromic devices based on reversible metal electrodeposition

Air conditioning and lighting costs can be reduced substantially by changing the optical properties of “intelligent windows.” The electrochromic devices studied to date have used copper as an additive. Copper, used here as an electrochromic material, was dissolved in an aqueous animal protein-derive...

Full description

Saved in:

Bibliographic Details
Published in:	Solar energy materials and solar cells Vol. 103; pp. 17 - 24
Main Authors:	de Mello, Dante A.A., Oliveira, Márcio R.S., de Oliveira, Lincoln C.S., de Oliveira, Silvio C.
Format:	Journal Article
Language:	English
Published:	Amsterdam Elsevier B.V 01-08-2012 Elsevier
Subjects:	Air conditioning. Ventilation Applied sciences Chemistry Copper Deposition Devices Dissolution Electrical engineering. Electrical power engineering Electrochemistry Electrochromism Electrodeposition Electrolytes Energy Energy. Thermal use of fuels Exact sciences and technology Gelatin General and physical chemistry Heating, air conditioning and ventilation Intelligent window Miscellaneous Natural energy Photoelectrochemistry. Electrochemiluminescence Reversible electrodeposition Solar energy Solid electrolyte Techniques, equipment. Control. Metering Transmittance Various equipment and components Electrochromism Reversible electrodeposition Intelligent window Copper Gelatin Solid electrolyte Water Photoelectrochemistry Binary compound Costs Electrochromic device Small angle X ray scattering Thermal stability Cyclic voltammetry Additive Gel electrolyte Tin addition Optical properties Visible radiation Electrodeposition Air conditioning Lighting equipment Thermogravimetry Mass loss Dissolution Transmittance Indium oxide Reversibility Transparent material Copper chloride Electrochemical impedance spectroscopy
Online Access:	Get full text
Tags:	Add Tag No Tags, Be the first to tag this record!

Description
Summary:	Air conditioning and lighting costs can be reduced substantially by changing the optical properties of “intelligent windows.” The electrochromic devices studied to date have used copper as an additive. Copper, used here as an electrochromic material, was dissolved in an aqueous animal protein-derived gel electrolyte. This combination constitutes the electrochromic system for reversible electrodeposition. Cyclic voltammetry, chronoamperometric and chromogenic analyses indicated that were obtained good conditions of transparency (initial transmittance of 70%), optical reversibility, small potential window (2.1V), variation of transmittance in visible light (63.6%) and near infrared (20%) spectral regions. Permanence in the darkened state was achieved by maintaining a lower pulse potential (−0.16V) than the deposition potential (−1.0V). Increasing the number of deposition and dissolution cycles favored the transmittance and photoelectrochemical reversibility of the device. The conductivity of the electrolyte (10−3S/cm) at several concentrations of CuCl2 was determined by electrochemical impedance spectroscopy. A thermogravimetric analysis confirmed the good thermal stability of the electrolyte, since the mass loss detected up to 100°C corresponded to water evaporation and decomposition of the gel started only at 200°C. Micrographic and small angle X-ray scattering analyses indicated the formation of a persistent deposit of copper particles on the ITO.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0927-0248 1879-3398
DOI:	10.1016/j.solmat.2012.03.019