Graphene-poly(nickel complex) as novel electrochromic nanocomposite for the fabrication of a robust solid-state device
| Autor: | J. R. Fonseca, Cristina Freire, Marta Nunes, Robert Hillman, Cosme Moura, Mariana Araújo |
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| Rok vydání: | 2017 |
| Předmět: |
chemistry.chemical_classification
Fabrication Materials science Nanocomposite Graphene chemistry.chemical_element 02 engineering and technology Polymer 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Anode law.invention Biomaterials Nickel Colloid and Surface Chemistry chemistry Chemical engineering law Electrochromism 0210 nano-technology |
| Zdroj: | Journal of colloid and interface science. 504 |
| ISSN: | 1095-7103 |
| Popis: | An electrochromic nanocomposite based on a nickel-salen polymeric film – poly[Ni(3-Mesalen)], Mesalen = N,N’-bis(3-methylsalicylideneiminate) – and graphene nanoplatelets (GFNPs) with enhanced electrochromic stability was successfully prepared by anodic electropolymerization. Although the electrochemical processes typical of the polymer film were not changed by the presence of graphene, higher electroactive surface coverages could be obtained for nanocomposite films, which suggest the incorporation of GFNPs into the polymeric network. The nanocomposite showed multi-electrochromic behavior, with color changes between yellow (reduced state) and green (oxidized state). The inclusion of GFNPs into the poly[Ni(3-Mesalen)] structure accelerates the switching process, with the response time for green coloration decreasing by 50.7% and for yellow coloration by 60.0%, for films prepared with 30 electropolymerization cycles. In terms of electrochemical stability, after 10,000 electrochemical cycles the loss of charge was 7% for the graphene nanocomposite. The nanocomposite film was used as electrochromic material to assemble a flexible solid-state electrochromic device (ECD), which exhibited an outstanding electrochemical stability - only 3% of charge loss after 15 days of continuous activity. |
| Databáze: | OpenAIRE |
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