Journal of Materials Science

, Volume 44, Issue 22, pp 6028–6034 | Cite as

Facile fabrication of NiOxHy films and their unique electrochromic properties

  • Fang Liu
  • Xin Zhang
  • Kang-Wei Zhu
  • Yu Song
  • Zhen-Hua Shi
  • Bo-Xue FengEmail author


The electrochromic (EC) NiOxHy films were fabricated through a facile sol–gel method. The formation of high quality NiOxHy films came from adding the xerogel back into the sol and prolonging the annealing time at gradually increasing temperature up to 250 °C. Scanning electron microscopy and atomic force microscopy characterizations indicated films were compact, homogenous, and smooth. Glance angle X-ray diffraction investigation testified NiOxHy films were of poor crystallization. The Fourier transform infrared, and thermogravimetry and differential thermal analysis showed that films contained the mixture of NiO, Ni(OH)2, NiOOH, water, and organic substance. With the increasing of the xerogel ratio, the optical absorbance and reflectance of films had larger differences between the colored and bleached state, respectively. The film with the xerogel ratio of 1:5 showed excellent EC properties with a transmittance contrast as high as 60.88% at λ = 560 nm, which was higher than other sol–gel nickel oxide films reported.


Differential Thermal Analysis Oxygen Evolution Reaction Colored State Electrochromic Property Bleached State 



We appreciate the financial supports of the National science Foundation of China (Grant No. 60576013, 60536010 and J0630313).


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Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • Fang Liu
    • 1
  • Xin Zhang
    • 1
  • Kang-Wei Zhu
    • 1
  • Yu Song
    • 1
  • Zhen-Hua Shi
    • 1
  • Bo-Xue Feng
    • 1
    Email author
  1. 1.Key Laboratory Magnetism and Magnetic Material of EducationLanzhou UniversityLanzhouPeople’s Republic of China

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