Size effect of nano SiO<sub>2</sub> microspheres in PMMA gel polymer electrolyte and its application in all-solid-state electrochromic devices

ZHAO Li; DU Heng; LIU Hu; GONG Yan; LI Xin; CHEN Yankun; WU Yan

doi:10.13801/j.cnki.fhclxb.20200914.001

Volume 38 Issue 5

May 2021

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ZHAO Li, DU Heng, LIU Hu, et al. Size effect of nano SiO2 microspheres in PMMA gel polymer electrolyte and its application in all-solid-state electrochromic devices[J]. Acta Materiae Compositae Sinica, 2021, 38(5): 1446-1454. doi: 10.13801/j.cnki.fhclxb.20200914.001

Citation:

ZHAO Li, DU Heng, LIU Hu, et al. Size effect of nano SiO₂ microspheres in PMMA gel polymer electrolyte and its application in all-solid-state electrochromic devices[J]. Acta Materiae Compositae Sinica, 2021, 38(5): 1446-1454. doi: 10.13801/j.cnki.fhclxb.20200914.001

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Size effect of nano SiO₂ microspheres in PMMA gel polymer electrolyte and its application in all-solid-state electrochromic devices

doi: 10.13801/j.cnki.fhclxb.20200914.001

Beijing Engineering Research Center of Textile Nanofiber, Beijing Key Laboratory of Clothing Materials R&D and Assessment, School of Design Science and Engineering, Beijing Institute of Fashion Technology, Beijing 100029, China

Received Date: 2020-06-15
Accepted Date: 2020-08-10

Available Online: 2020-09-22

Publish Date: 2021-05-01

Abstract

Abstract

In this paper, nano SiO₂ microspheres with different particle sizes were prepared by the Stöber method, which were added to polymethyl methacrylate (PMMA)-based gel polymer electrolytes, and the size effect of nano SiO₂ microspheres and its effect on the performance of all solid-state electrochromic devices were studied. The results show that the volume ratio of ethyl orthosilicate and ethanol affects the particle size of the obtained nano SiO₂ microspheres. The larger the volume ratio, the smaller the particle size of the prepared nano SiO₂ microspheres. In the PMMA-based gel polymer electrolyte, when nano SiO₂ microspheres content is the same, the electrochemical window of the electrolyte first increases and then decreases with the decrease of nano SiO₂ microspheres particle size, and the ionic conductivity increases with the increase of its particle size. The electrochemical window reached its maximum at 150 nm of nano SiO₂ microspheres, where the increase in ionic conductivity became insignificant. Then, 150 nm SiO₂ is added to PMMA gel electrolyte with a content of 7wt%, which has the electrochemical window of 4.8 V and the conductivity of 1.13 mS/cm. Besides, the electrolyte was used to assembly transmissive all-solid-state electrochromic device with a structure: Electrically conductive glass (ITO)‖SiO₂/propylene carbonate (PC)-LiClO₄/PMMA‖metal-supramolecular polymer‖ITO. The obtained device can change color between light green and dark blue with a high contrast of 60.1%, and the device stability is significantly improved.
- nano SiO₂ microspheres,
- gel polymer electrolyte,
- size effect,
- electrochemical window,
- electrochromic device
Long Abstrsct
Innovation Points

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References(19)

References

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