Graphene-poly(nickel complex) as novel electrochromic nanocomposite for the fabrication of a robust solid-state device

JOURNAL OF COLLOID AND INTERFACE SCIENCE

卷:504

Article

Araujo, Mariana P.¹  Nunes, Marta¹  Fonseca, Joana²  Hillman, Robert^3,4  Freire, Cristina¹ 

[1] Univ Porto, Fac Ciencias, REQUIMTE LAQV, Dept Quim & Bioquim, P-4169007 Oporto, Portugal

[2] CeNTI, Rua Fernando Mesquita 2785, P-4760034 Vila Nova De Famalicao, Portugal

[3] Univ Porto, Fac Ciencias, CIQ, Dept Quim & Bioquim, P-4169007 Oporto, Portugal

[4] Univ Leicester, Dept Chem, Leicester LE1 7RH, Leics, England

关键词: Electrochromism;    Metal salen complexes;    Graphene;    Polymeric nanocomposites;    Solid-state device;   

DOI  :  10.1016/j.jcis.2017.06.023

来源: Elsevier

【 摘 要 】

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. (C) 2017 Elsevier Inc. All rights reserved.

【 授权许可】

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