电致变色纳米氧化镍薄膜的溶胶-凝胶法制备与表征

无机材料学报

电致变色纳米氧化镍薄膜的溶胶-凝胶法制备与表征

王连超^1,2,3; 孟凡利²; 孙宇峰²; 黄行九²; 刘锦淮²

1, 中国科学技术大学化学系; 合肥 230026; 2. 中国科学院合肥智能机械研究所; 合肥 230031; 3. 合成工业大学, 合肥 230009

收稿日期:2003-10-28 修回日期:2003-12-15 出版日期:2004-11-20 网络出版日期:2004-11-20

Preparation and Characterization of Nanocrystalline Electrochromic NiO Thin Films Prepared by Sol-Gel Method

WANG Lian-Chao^1,2,3; MENG Fan-Li²; SUN Yu-Feng²; HUANG Xing-Jiu²; LIU Jin-Huai²

1.Department of Chemistry; University of Science and Technology of China; Hefei 230026; China; 2.Institute of Intelligent Machines; Chinese Academy of Sciences; Hefei 230031, China; 3. Hefei University of Technology; Hefei 230009; China

Received:2003-10-28 Revised:2003-12-15 Published:2004-11-20 Online:2004-11-20

摘要/Abstract

摘要： 以无水氯化镍、乙醇为前驱液,加入适量的丁醇和柠檬酸为稳定剂,通过回流、水解得到稳定的溶胶;采用浸渍-提拉的方法在ITO导电玻璃上形成均匀的膜层;分析了溶胶制备中加水量的影响;研究了热处理温度对制备膜层的结构、光透过率的影响;对经过不同处理的膜层进行X射线衍射、透射电子显微镜、扫描电子显微镜、热重分析等研究表明:在空气中加热到350℃、保温30min薄膜分解为稳定的具有立方结构的NiO纳米晶;以氢氧化钾水溶液为电解质的循环伏安、电致变色实验结果表明制备的纳米氧化镍薄膜具有良好的电致变色特性.

关键词: 溶胶-凝胶, 电致变色, 纳米晶, 氧化镍薄膜

Abstract: A precursor solution was prepared by dissolving nickel chloride salt and citric acid in butanol and ethanol. The solution was refluxed under continuous stirring and adding predetermined amount of water
(solution in solvent). The thin films were deposited by dip-coating methods. The thin films were analyzed by TG, DSC, TEM, SEM, XRD and cyclic voltammetry. The influence of heat treatment temperature on film transmittance
in the range of 350 nm to 850 nm was discussed. Results show that the thin film can transform from amorphous into cubic-NiO nanocrystalline by means of heat treatment. The results of cyclic voltammetry
of the films, carried out in an electrochemical cell with three electrodes and 0.1mol/L KOH electrolyte ,show that the NiO thin film treated at 350℃ for 30min has a good electrochromic performance. As given
voltage, the films reversibly change their colors from transparent to brown, and their transmittance can modulate from 80% to 30%. The cyclic voltammeter results also show that the film is quick to reach its
electrochromic stable condition.

Key words: nickel oxide thin film, electrochromic properties, sol-gel, nanocrystalline

中图分类号:

TQ174
TB43

王连超,孟凡利,孙宇峰,黄行九,刘锦淮. 电致变色纳米氧化镍薄膜的溶胶-凝胶法制备与表征[J]. 无机材料学报.

WANG Lian-Chao,MENG Fan-Li,SUN Yu-Feng,HUANG Xing-Jiu,LIU Jin-Huai. Preparation and Characterization of Nanocrystalline Electrochromic NiO Thin Films Prepared by Sol-Gel Method[J]. Journal of Inorganic Materials.

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