Mingyuan Fang, Yuchao Song, Sijia Pang, Deng Pu, Juan Guo, Qilong Gao, Mingju Chao, Erjun Liang
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引用次数: 0
摘要
电致变色材料具有色彩转换和调节室内太阳辐射的能力，已被广泛应用于智能窗户中。研究具有近红外光吸收能力的钨青铜的电致变色性能对于获得多功能智能窗具有重要意义。本文合成了空间群为 P63/mcm 的纳米钾钨青铜 KxWO3，以研究晶体结构和 W 离子价态对其电致变色性能的影响。通过溶热法改变反应溶液的组成，可以控制样品中 K 的含量 x，同时还可以调整晶体结构中六方和三方通道的大小以及 W 离子的价态。电致变色性能的提高主要得益于六方和三方通道尺寸的协同效应。
Enhanced electrochromic performance of KxWO3 by tailoring crystal structure and valence state
Electrochromic materials have been widely applied in smart windows due to their color conversion and adjusting indoor solar radiation abilities. The researches on electrochromic properties of tungsten bronzes with near-infrared light absorbing abilities are important to obtain multifunctional smart windows. Here, nano potassium tungsten bronze KxWO3 with space group P63/mcm has been synthesized to study the effects of crystal structures and valence states of W ions on its electrochromic properties. By altering the composition of reaction solution in solvothermal method, the K content x of samples can be controlled together with the adjustments in sizes of hexagonal and trigonal channels in the crystal structure and valence states of W ions. The maximum optical modulation and coloration efficiency are achieved for the maximum x. The enhanced electrochromic performance mainly benefits from the synergistic size effects of hexagonal and trigonal channels.
期刊介绍：
This interdisciplinary journal is devoted to the physics, chemistry and materials science of diffusion, mass transport, and reactivity of solids. The major part of each issue is devoted to articles on:
(i) physics and chemistry of defects in solids;
(ii) reactions in and on solids, e.g. intercalation, corrosion, oxidation, sintering;
(iii) ion transport measurements, mechanisms and theory;
(iv) solid state electrochemistry;
(v) ionically-electronically mixed conducting solids.
Related technological applications are also included, provided their characteristics are interpreted in terms of the basic solid state properties.
Review papers and relevant symposium proceedings are welcome.
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