Chinese Journal of Applied Chemistry ›› 2022, Vol. 39 ›› Issue (9): 1345-1359.DOI: 10.19894/j.issn.1000-0518.220049

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Advances of Inorganic‑inorganic Composite Electrochromic Films

Xin GU, Wen-Qing WANG, Jun-He HOU, Lu GAO, Ming-Hua HUANG, Ge SU()   

  1. School of Materials Science and Engineering,Ocean University of China,Qingdao 266100,China
  • Received:2022-02-25 Accepted:2022-05-31 Published:2022-09-01 Online:2022-09-08
  • Contact: Ge SU
  • About author:gesu@ouc.edu.cn
  • Supported by:
    the Natural Science Foundation of China(21775142)

Abstract:

Under an external voltage, the optical properties (e.g. color, transmittance, etc.) of electrochromic materials can controllably and reversibly be changed, which has an important application prospects in the fields of energy conservation and emission reduction. With the continuous innovation and development of related research, the single-component electrochromic materials cannot show the expected electrochromic properties due to the limitations of their own structure and performance, and cannot be designed and regulated in their structure and performance, so it is increasingly unable to meet the needs of practical applications. Comparing with the non-composite electrochromic materials, the composite materials have obvious advantages in this aspect. Through the reasonable material design and with the coordination of each component, the core competitiveness of the composite materials is mainly represented by the electrochromic materials with excellent structure and performance can be obtained by stimulating the advantages and overcoming the disadvantages of each component. Therefore, more and more research focus on the composite electrochromic materials in recent years. At present many kinds of composite electrochromic materials have been researched, which mainly can be divided into three categories as inorganic-inorganic composite, organic-inorganic composite and organic-organic composite according to whether the composite components are inorganic or organic materials. Compared with the organic electrochromic materials, the inorganic electrochromic materials have significant advantages in material composition control, mechanical properties, optical modulation, service stability, life and other aspects. Therefore, either the single-component or the composite inorganic electrochromic materials have always been an important direction of research in this field. Hence, this paper devotes to the research status and development tendency of the inorganic-inorganic composite electrochromic materials, devices and electrolytes, including the research progress, the existing problems and the development trend. It will provide a basis for the further development and application of composite electrochromic materials.

Key words: Electrochromic materials, Inorganic-inorganic composite, Property, Device, Electrolyte

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