Abstract
Electrochromic nickel oxide ion storage anodes compatible to tungsten oxide as cathode layer are prepared by a combustion reaction with urea as fuel and nickel nitrate as oxidizer at temperatures not higher than 230 °C to stay well within the temperature range in which thermally sensitive intercalated tungsten oxide layers are still stable. The precursors for nickel oxide are well available materials and the preparation of the layers can be performed at low energy input by spin-coating onto the substrate and moderate heating on a hot-plate. Ethanol and acetone where used as solvents and reveal large differences in the resulting film morphologies, electric and electrochromic characteristics. Cyclic voltammetry measurements in contact to lithium perchlorate (LiClO4) in propylene carbonate show remarkable colouration efficiencies at 550 nm of 47 cm2 Câ1 for NiO prepared from ethanol solution and 92 cm2 Câ1 for NiO prepared from acetone solution, which are, to the best of our knowledge, among the highest reported values for Li+-intercalation into NiO prepared at moderate substrate temperature reported so far.Graphic abstract
Highlights
Energy saving is one of the relevant strategies to ensure sustainable modern societies [1]
Cyclic voltammetry measurements in contact to lithium perchlorate (LiClO4) in propylene carbonate show remarkable colouration efficiencies at 550 nm of 47 cm2 C-1 for Nickel oxide (NiO) prepared from ethanol solution and 92 cm2 C-1 for NiO prepared from acetone solution, which are, to the best of our knowledge, among the highest reported values for Li?-intercalation into NiO prepared at moderate substrate temperature reported so far
The spinning rate, drying time and temperature were varied in a wider range and the optimum conditions were chosen as indicated above. 230 °C was determined as the minimum temperature for ignition of the combustion reaction (CR) by observing a dried film on a hot plate which was slowly heated from room temperature under detailed monitoring of the surface temperature
Summary
Energy saving is one of the relevant strategies to ensure sustainable modern societies [1]. Electrochromic devices, in which the transmission of light can be tuned electrically can form a relevant part of smart windows. They can be integrated into central building control systems to optimize the energy management. E.g. used in combination with a transparent inorganic solid electrolyte such as lithium phosphorous oxynitride (LiPON) in an all-solid-state device, it preserves the high mechanical and thermal stability which can be of particular advantage when used with large-area electrochromic windows [22, 23] When prepared to an equal thickness, e.g., it can store an identical amount of Li? LiPON can be prepared at moderate temperatures via sputtering deposition but shows high instability against water [33,34,35,36]
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
