公开(公告)号：WO2021155247A1

公开(公告)日：2021-08-05

申请号：PCT/US2021/015851

申请日：2021-01-29

Applicant: THE REGENTS OF THE UNIVERSITY OF COLORADO

Inventor： HERNANDEZ, Tyler S. ,  STRAND, Michael T. ,  YEANG, Andrew L. ,  MCGEHEE, Michael D.

IPC: G02F1/1506 ,  G02F1/1514 ,  G02F1/15 ,  G02F1/155 ,  G02F1/01 ,  G02F1/00 ,  G02F1/1524

Abstract: Electrochromic "smart" windows allow control of solar and heat flux through the window without sacrificing the view. Despite such appeal, traditional technologies lack the inability to simultaneously achieve fast switching with color neutral tinting and a wide optical dynamic range at low cost. Reversible metal electrodeposition (RME) addresses the drawbacks of existing metal-oxide electrochromic technologies. Several possible RME electrolytes at various pHs with different supporting anions were studied (NO3-, SO42-, ClO4, Cl‑, Br-). Acidic perchlorate electrolytes work particularly well, permitting fully reversible metal electrodeposition without harming the substrate or introducing irreversible side reactions. The perchlorate electrolyte shows promising long-term durability in terms of both cycle life and shelf-life, demonstrating 10,000 stable cycles with no evidence of electrode etching. In addition, the use of this perchlorate electrolyte widens the deposition voltage window, enabling construction of relatively large area dynamic windows that tint relatively uniformly with fast, color-neutral switching at low cost.

公开(公告)号：WO2022087305A1

公开(公告)日：2022-04-28

申请号：PCT/US2021/056100

申请日：2021-10-21

Applicant: THE REGENTS OF THE UNIVERSITY OF COLORADO, A BODY CORPORATE ,  THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY

Inventor： STRAND, Michael T. ,  BARILE, Christopher ,  HERNANDEZ, Tyler S. ,  YEANG, Andrew L. ,  MCGEHEE, Michael D.

IPC: G02F1/1506 ,  G02F1/1514 ,  G02F1/155

Abstract: Dynamic windows with adjustable tint give users greater control over flow of light and heat. Reversible metal electrodeposition dynamic windows include (i) a transparent or translucent conductive electrode; (ii) an electrolyte solution in contact with the electrode, the electrolyte solution comprising metal cations that are reversibly electrodeposited onto the transparent electrode upon application of a cathodic potential; and (iii) a counter electrode. The electrolyte solution advantageously includes a small amount of an additive (e.g., an inhibitor, an accelerator, a leveler, or an organic or inorganic molecule that similarly serves to enhance the surface morphology of the metal cations during reversible metal electrodeposition onto the transparent electrode). Such enhancement of surface morphology during the reversible electrodeposition of the metal tinting layer over the electrode enhances one or more of color neutrality, transmittance characteristics of visible wavelengths (e.g., ability to achieve a near 0% transmission privacy state), infrared reflectance, or switching speed.