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首页> 外文期刊>Advanced Functional Materials >Anodic Electrochromism for Energy-Efficient Windows: Cation/Anion-Based Surface Processes and Effects of Crystal Facets in Nickel Oxide Thin Films
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Anodic Electrochromism for Energy-Efficient Windows: Cation/Anion-Based Surface Processes and Effects of Crystal Facets in Nickel Oxide Thin Films

机译：节能型窗户的阳极电致变色：基于阳离子/阴离子的表面过程以及氧化镍薄膜中晶面的影响

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摘要

Anodic electrochromic (EC) oxides are of major interest as counter electrodes for smart window applications owing to their unique optical properties upon charge insertion and extraction. However, performance optimization of such oxides has been hampered by limited understanding of their EC mechanism, particularly in Li+-conducting electrolytes. This paper reports on NiOx films with 1.16 x 1.32, prepared by sputter deposition. These films are immersed in an electrolyte of lithium perchlorate in propylene carbonate, and EC properties are studied by cyclic voltammetry and in situ optical transmittance measurements. The electrochromism is significantly enhanced at large values of x. It has been found that charge exchange in Ni oxide is mainly due to surface processes and involves both cations and anions from the electrolyte, which is different from the case of cathodic EC materials such as WO3. Whereas previous studies of Ni oxide have focused on cation intercalation, the cation/anion-based mechanism presented here offers a new paradigm for designing and developing EC devices such as smart windows for energy efficient buildings.
机译：阳极电致变色（EC）氧化物作为智能窗口应用的对电极特别受关注，因为它们在电荷插入和提取时具有独特的光学性能。但是，由于对它们的EC机理的了解有限，特别是在含Li +的电解质中，阻碍了此类氧化物的性能优化。本文报道了通过溅射沉积制备的1.16 x 1.32的NiOx膜。将这些膜浸入碳酸亚丙酯中高氯酸锂的电解质中，并通过循环伏安法和原位光学透射率测量研究EC性能。在较大的x值下，电致变色显着增强。已经发现，氧化镍中的电荷交换主要是由于表面过程，并且涉及来自电解质的阳离子和阴离子，这与阴极EC材料例如WO 3的情况不同。尽管以前对氧化镍的研究都集中在阳离子的嵌入上，但此处介绍的基于阳离子/阴离子的机理为设计和开发EC设备（例如节能建筑的智能窗户）提供了新的范例。

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