Hybrid dynamic windows using reversible metal electrodeposition and ion insertion
- Univ. of Nevada, Reno, NV (United States); University of Colorado Boulder
- Stanford Univ., CA (United States); Univ. of Colorado, Boulder, CO (United States)
- Univ. of Colorado, Boulder, CO (United States)
- Univ. of Nevada, Reno, NV (United States)
Dynamic windows with electronically controlled transmission reduce glare without obstructing views while increasing the energy efficiency of buildings and automobiles via lighting, heating and cooling savings. Electrochromic materials, which change colour with voltage, are widely explored for use in dynamic windows, but they have not been extensively commercialized due to problems associated with colour, cost, switching speed and durability. Here, we develop a class of dynamic windows that combines reversible metal electrodeposition with ion insertion chemistry. These devices function through the reversible electroplating of Bi and Cu at the working electrode and Li+ insertion in a nickel oxide counter electrode. In one minute, 100 cm2 windows uniformly switch between a clear state with 75% transmission and a colour-neutral black state possessing 10% transmission, which represents a significant improvement over previous metal-based architectures. We demonstrate that these hybrid windows cycle at least 4,000 times without degradation and are compatible with flexible substrates. Finally, we discuss how this approach can be used to design practical large-scale windows.
- Research Organization:
- Univ. of Colorado, Boulder, CO (United States)
- Sponsoring Organization:
- National Science Foundation (NSF); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Energy Efficiency Office. Building Technologies Office
- Grant/Contract Number:
- EE0008226
- OSTI ID:
- 1688410
- Journal Information:
- Nature Energy, Journal Name: Nature Energy Journal Issue: 3 Vol. 4; ISSN 2058-7546
- Publisher:
- Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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