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Reversible Metal Electrodeposition and Ion Intercalation for Dynamic Windows
AuthorIslam, Molla Shakirul
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Buildings are responsible for ~40% of total U.S. energy demand, and lighting, heating, and cooling are responsible for ~53% of total building energy consumption. Dynamic windows, which electronically control opacity and heat flow, can save up to 10-15% of the total energy consumption of a building by reducing lighting, heating, and cooling demand compared with static windows that use low-E glass. However, due to their high cost, slow switching speed, and inadequate opacity, traditional electrochromic dynamic windows are not yet widely commercialized for building applications. In this dissertation, I have developed a new class of dynamic windows based on reversible metal electrodeposition (RME) coupled with ion storage layer-based counter electrodes. I have studied the stability and electrochromic properties of metal oxides and hexacyanoferrate-based compounds for their application as a counter electrode in dynamic windows. In addition to the improved scalability of these devices, the ion storage layer-based counter electrode also improves device switching speed. I also studied pH-neutral electrolytes for reversible Zn electrodeposition on a transparent conductive electrode for application in dynamic windows. A reaction mechanism for the reversible Zn electrodeposition was proposed during the deposition and dissolution process. As a result of compact Zn electrodeposition on a transparent conductive electrode, the dynamic windows showed fast switching speeds, <0.01% opacity in the opaque state, and excellent resting stability. The high opacity of these windows, in particular, opens a new direction for using dynamic windows in residential settings, where privacy is required.
|Committee Member||Barile, Christopher; Odoh, Samuel; Alpuche, Mario; Chidambaram, Dev; Ben-Idris, Mohammed|
|Rights||Creative Commons Attribution-NonCommercial 4.0 United States|