Influence of the diameter of multi-walled carbon nanotubes on the electrochromic performance of NiO thin films

•MWCNTs do not modify the structure and morphology of NiO films.•NiO-MWCNTs films have larger amounts of OH and O than pure NiO films.•Charge-transfer kinetics varies according to size of MWCNTs.•Differences in durability and reversibility are observed by varying the diameter of MWCNTs. This work pr...

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Bibliographic Details
Published in:Materials letters 2021-04, Vol.289, p.129403, Article 129403
Main Authors: Berlanga-Rodriguez, A., Avalos-Belmontes, F., Arvizu, M.A., Garcia, C.R., Rodríguez-Varela, F.J., Oyervides-Muñoz, E., Garcia-Lobato, M.A.
Format: Article
Language:English
Subjects:
Charge transfer
Diameters
Electrochromic NiO films
Electrochromism
Electrostatic spray deposition
Functionalized multi-walled carbon nanotubes
Materials science
Morphology
Multi wall carbon nanotubes
Nickel oxides
Spraying
Thin films
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Summary:•MWCNTs do not modify the structure and morphology of NiO films.•NiO-MWCNTs films have larger amounts of OH and O than pure NiO films.•Charge-transfer kinetics varies according to size of MWCNTs.•Differences in durability and reversibility are observed by varying the diameter of MWCNTs. This work presents the influence of functionalized multi-walled carbon nanotubes (MWCNTs) with different diameter on the electrochromic performance of compact NiO films deposited by electrostatic spraying. MWCNTs did not noticeable modify the structure and morphology of NiO films, although they tended to adsorb larger amounts of OH and O. Spectroelectrochemical measurements show that MWCNTs with a diameter of 15–25 nm are preeminent to enhance the charge-transfer kinetics (36.1%), coloration efficiency (17.3%), reversibility (12.5%) and cycling durability (66.6%) of NiO films.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2021.129403