Bingkun Huang, Bin Wang, Feifei Zhao, Yukai Xu, Haizeng Li, Jia-Yue Yang, William W. Yu
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引用次数: 0
摘要
传统的可逆二氧化锰(MnO2)电沉积智能窗通常受到狭窄的光调制范围、非中性颜色和高酸性电解质的限制。本文利用近中性电解质(pH = 5.74)构建了基于Zn/MnO2双电沉积的新型智能窗口。该器件通过可逆Zn电沉积拓宽了MnO2的光调制范围,实现了透明和中性深棕色之间的显着颜色变化(色度C* = 9.48)。此外,碘化物(I−)作为氧化还原介质,通过促进MnO2和Zn的溶解,显著延长了器件的循环耐久性。I−化学还原MnO2生成Mn2+并氧化为三碘化物(I3−),I3−随后自发氧化Zn生成Zn2+并还原回I−,从而完成一个介质循环。因此,具有I -介质的器件表现出令人印象深刻的循环耐久性(1,000 vs 60次循环)。最后,Zn和MnO2电极之间显著的电位差赋予了器件优异的储能性能。该研究为开发新型多功能设备提供了思路。
Constructing Reversible Zn/MnO2 Dual-Electrodeposition-Based Smart Window with Wide Modulation Range by an Iodide Mediator in Near-Neutral Electrolyte
Conventional reversible manganese dioxide (MnO2) electrodeposition-based smart windows typically endure the constraints of narrow light modulation range, non-neutral color, and highly acidic electrolytes. Herein, novel Zn/MnO2 dual-electrodeposition-based smart windows are constructed utilizing near-neutral electrolytes (pH = 5.74). The devices broaden the light modulation range of MnO2 by reversible Zn electrodeposition, achieving a remarkable color change between transparent and neutral dark brown (chroma C* = 9.48). Furthermore, an iodide (I−) as a redox mediator is used to significantly prolong the devices’ cycling durability by promoting the dissolution of MnO2 and Zn. I− chemically reduces MnO2 to form Mn2+ and is oxidized to triiodide (I3−), I3− then spontaneously oxidizes Zn to form Zn2+ and is reduced back to I−, thus completing one mediator cycle. Consequently, the devices with the I− mediator exhibit impressive cycling durability (1,000 vs 60 cycles). Finally, the significant potential difference between the Zn and MnO2 electrodes endows the devices with excellent energy storage performance. The study offers a line of thought for developing novel multifunctional devices.
期刊介绍:
Advanced Optical Materials, part of the esteemed Advanced portfolio, is a unique materials science journal concentrating on all facets of light-matter interactions. For over a decade, it has been the preferred optical materials journal for significant discoveries in photonics, plasmonics, metamaterials, and more. The Advanced portfolio from Wiley is a collection of globally respected, high-impact journals that disseminate the best science from established and emerging researchers, aiding them in fulfilling their mission and amplifying the reach of their scientific discoveries.