Enhancing the dark-state bistability and thermal stability of zinc dynamic windows with nitrile electrolytes

Bhoumik, Nikhil C.; Potts, Caleb R.; Hernandez, Tyler S.; Barile, Christopher J.

doi:10.1016/j.device.2024.100412

Enhancing the dark-state bistability and thermal stability of zinc dynamic windows with nitrile electrolytes

Journal Article · Wed Jun 05 00:00:00 EDT 2024 · Device

DOI:https://doi.org/10.1016/j.device.2024.100412· OSTI ID:2506763

Bhoumik, Nikhil C. ^[1]; Potts, Caleb R. ^[2]; Hernandez, Tyler S. ^[3]; ^[2]

University of Nevada, Reno, NV (United States); University of Nevada - Reno
University of Nevada, Reno, NV (United States)
Tynt Technologies, Boulder, CO (United States)

Reversible metal electrodeposition (RME) for dynamic windows is a promising alternative to traditional electrochromics. We explore the reasons behind the bistability of practical RME dynamic windows under a wide temperature range, i.e., how well they maintain their dark state without external power. While Zn dynamic windows with dimethyl sulfoxide electrolytes exhibit adequate bistability at room temperature, their performance degrades at elevated temperatures due to the presence of small amounts of water. Here, to overcome this problem, we developed a set of Zn nitrile electrolytes. The integrated devices can maintain dark-state bistability over at least 1 month at 85°C with 0.1% transmission using a propionitrile (PrCN) electrolyte. Additionally, the PrCN-based Zn dynamic windows possess high optical contrast, color-neutral switching, and promising cyclability, making Zn RME in nitrile electrolytes a promising solution for achieving robust dynamic windows.

View Accepted Manuscript (DOE)

Research Organization:: Tynt Technologies, Boulder, CO (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Energy Efficiency Office. Building Technologies Office; National Science Foundation (NSF)

Grant/Contract Number:: EE0009701

OSTI ID:: 2506763

Journal Information:: Device, Journal Name: Device Journal Issue: 8 Vol. 2; ISSN 2666-9986

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Enhancing the dark-state bistability and thermal stability of zinc dynamic windows with nitrile electrolytes

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