Transparent, High‐Charge Capacity Metal Mesh Electrode for Reversible Metal Electrodeposition Dynamic Windows with Dark‐State Transmission <0.1%
[1];
- Department of Chemical and Biological Engineering University of Colorado Boulder Boulder CO 80303 USA
- Department of Chemical and Biological Engineering University of Colorado Boulder Boulder CO 80303 USA, Department of Chemistry Stanford University Stanford CA 94305 USA
- Department of Chemical and Biological Engineering University of Colorado Boulder Boulder CO 80303 USA, Department of Materials Science and Engineering Stanford University Stanford CA 94305 USA
- Department of Materials Science and Engineering Stanford University Stanford CA 94305 USA
- Department of Physics University of Colorado Boulder Boulder CO 80309 USA, Renewable and Sustainable Energy Institute: National Renewable Energy Laboratory and University of Colorado at Boulder Boulder CO 80303 USA
- Department of Physics University of Colorado Boulder Boulder CO 80309 USA, Renewable and Sustainable Energy Institute: National Renewable Energy Laboratory and University of Colorado at Boulder Boulder CO 80303 USA, Materials Science and Engineering Program University of Colorado Boulder Boulder CO 80303 USA
- Department of Chemistry University of Nevada Reno Reno NV 89503 USA
- Department of Chemical and Biological Engineering University of Colorado Boulder Boulder CO 80303 USA, Renewable and Sustainable Energy Institute: National Renewable Energy Laboratory and University of Colorado at Boulder Boulder CO 80303 USA, Materials Science and Engineering Program University of Colorado Boulder Boulder CO 80303 USA, National Renewable Energy Laboratory Golden CO 80401 USA
Abstract Dynamic windows allow user control over light and heat flow to save energy and maximize comfort. Reversible metal electrodeposition (RME) dynamic windows can uniquely tint to a color‐neutral privacy state (0.1% visible light transmission). The design parameters of transparent metal mesh counter electrodes for high‐contrast RME dynamic windows: high transparency, charge capacity and surface area with low haze, sheet resistance and cost are discussed, concluding that woven metal meshes meet these design parameters. Electroplated current is measured on an indium tin oxide electrode and two meshes with different wire spacings, showing the meshes’ cylindrical geometry enable them to draw more current per square area. The mesh material composition is analyzed to ensure cycling durability in a CuBi electrolyte by developing a transparent mesh with an inert core (stainless steel, SS), a thin Au coating, and a high charge‐capacity (1.5 C cm −2 ) CuBi outer coating. The study demonstrates that the films maintain a consistent Cu:Bi ratio and optical properties after 250 privacy cycles or 1500 cycles to 10% transmission, showing that the Cu and Bi coating is effective in keeping the films from becoming Cu rich with cycling. Finally, a 100 cm 2 device with excellent uniformity and color neutrality is demonstrated.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 1883416
- Journal Information:
- Advanced Energy Materials, Journal Name: Advanced Energy Materials Vol. 12 Journal Issue: 32; ISSN 1614-6832
- Publisher:
- Wiley Blackwell (John Wiley & Sons)Copyright Statement
- Country of Publication:
- Germany
- Language:
- English
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