Transparent, High‐Charge Capacity Metal Mesh Electrode for Reversible Metal Electrodeposition Dynamic Windows with Dark‐State Transmission <0.1%
Transparent, High‐Charge Capacity Metal Mesh Electrode for Reversible Metal Electrodeposition Dynamic Windows with Dark‐State Transmission <0.1%
复制标题
透明，%20High—Charge%20Capacity%20Metal%20Mesh%20Electrode%20for%20Reversible%20Metal%20Electrodeposition%20Dynamic%20Windows%20with%20Dark—State%20Transmission%20<0.1%
DOI：
10.1002/aenm.202200854
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发表时间：
2022
影响因子：
27.8
通讯作者：
McGehee, Michael D.
中科院分区：
文献类型：
--
作者：
Yeang, Andrew L.;Hernandez, Tyler S.;Strand, Michael T.;Slotcavage, Daniel J.;Abraham, Eldho;Smalyukh, Ivan I.;Barile, Christopher J.;McGehee, Michael D.
动态窗户允许用户控制光和热流动，以节省能源并最大限度地提高舒适度。可逆金属电沉积（RME）动态窗户可以独特地着色到中性色隐私状态（0.1%可见光透射率）。讨论了用于高对比度RME动态窗口的透明金属网对电极的设计参数：高透明度、电荷容量和具有低雾度、薄层电阻和成本的表面积，得出编织金属网满足这些设计参数的结论。在氧化铟锡电极和具有不同线间距的两个网格上测量电镀电流，显示网格的圆柱形几何形状使它们能够在每平方面积上汲取更多电流。通过开发具有惰性芯（不锈钢，SS）、薄Au涂层和高电荷容量（1.5 C cm−2）Cu/Bi外涂层的透明网，分析网材料成分，以确保在Cu/Bi电解质中的循环耐久性。该研究表明，在250次隐私循环或1500次循环至10%透射率后，膜保持一致的Cu：Bi比率和光学性质，表明Cu和Bi涂层有效地防止膜随着循环变得富含Cu。最后，一个100平方厘米的设备具有良好的均匀性和颜色的中性被证明。
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 cm2device with excellent uniformity and color neutrality is demonstrated.