Flexible Viologen Electrochromic Devices with Low Operational Voltages Using Reduced Graphene Oxide Electrodes

Palenzuela, Jesús; Viñuales, Ana; Odriozola, Ibon; Cabañero, Germán; Grande, Hans J.; Ruiz, Virginia

doi:10.1021/am503869b

Cited by 102 publications

(56 citation statements)

References 27 publications

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“…[19][20][21][22] In particular, GO could be easily reduced into its reduced form (rGO) on the electrode surface by electrochemistry. 23, 24 We thus expected that the number of oxygenated groups of GO and the corresponding states of the graphene derivatives (GO or rGO) at the electrodes should be easily modulated by different applied potentials. However, the potential-responsive switch based on GO-related system has not been reported until now.…”

Section: Introductionmentioning

confidence: 99%

Multiple-Stimuli Responsive Bioelectrocatalysis Based on Reduced Graphene Oxide/Poly(N-isopropylacrylamide) Composite Films and Its Application in the Fabrication of Logic Gates

Wang

Lian²,

Yao

et al. 2015

ACS Appl. Mater. Interfaces

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In the present work, reduced graphene oxide (rGO)/poly(N-isopropylacrylamide) (PNIPAA) composite films were electrodeposited onto the surface of Au electrodes in a fast and one-step manner from an aqueous mixture of a graphene oxide (GO) dispersion and N-isopropylacrylamide (NIPAA) monomer solutions. Reflection-absorption infrared (IR) and Raman spectroscopies were employed to characterize the successful construction of the rGO/PNIPAA composite films. The rGO/PNIPAA composite films exhibited reversible potential-, pH-, temperature-, and sulfate-sensitive cyclic voltammetric (CV) on-off behavior to the electroactive probe ferrocenedicarboxylic acid (Fc(COOH)2). For instance, after the composite films were treated at -0.7 V for 7 min, the CV responses of Fc(COOH)2 at the rGO/PNIPAA electrodes were quite large at pH 8.0, exhibiting the on state. However, after the films were treated at 0 V for 30 min, the CV peak currents became much smaller, demonstrating the off state. The mechanism of the multiple-stimuli switchable behaviors for the system was investigated not only by electrochemical methods but also by scanning electron microscopy and X-ray photoelectron spectroscopy. The potential-responsive behavior for this system was mainly attributed to the transformation between rGO and GO in the films at different potentials. The film system was further used to realize multiple-stimuli responsive bioelectrocatalysis of glucose catalyzed by the enzyme of glucose oxidase and mediated by the electroactive probe of Fc(COOH)2 in solution. On the basis of this, a four-input enabled OR (EnOR) logic gate network was established.

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Section: Introductionmentioning

confidence: 99%

Multiple-Stimuli Responsive Bioelectrocatalysis Based on Reduced Graphene Oxide/Poly(N-isopropylacrylamide) Composite Films and Its Application in the Fabrication of Logic Gates

Wang

Lian²,

Yao

et al. 2015

ACS Appl. Mater. Interfaces

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“…Electrochromism is a phenomenon where the light transmission or reflection of a material reversibly changes through electrochemical oxidation or reduction. It is widely used in display devices, smart windows, mirrors and military camouflage for improving indoor energy efficiency or personal visual comfort . In electrochromic devices (ECDs), ITO or NWs are the most commonly used electrode materials.…”

Section: Applications Of the Gtesmentioning

confidence: 99%

“…Compared the ECDs with bare ITO‐PET electrodes, the ECDs containing GO and RGO in the mixture exhibited lower switching voltages between the colored and bleached states. The GO/RGO pair also showed electrocatalytic activity due to the presence of the electrochromic probe (EtV 2+ ), which allowed the ECDs to have a higher optical contrast than those without graphene at the same voltage . The ECDs can also be fabricated using only CVD‐grown graphene as the TEs for both cathode and anode.…”

Section: Applications Of the Gtesmentioning

confidence: 99%

Graphene as Transparent Electrodes: Fabrication and New Emerging Applications

Liu

2016

Small

168

112

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Graphene has been regarded as a promising candidate for a new generation of transparent electrodes (TEs) due to its prominent characteristics including high optical transmittance, exceptional electronic transport, outstanding mechanical strength, and environmental stability. Comprehensive and critical insights into the latest advances in graphene-based TEs (GTEs) since, but not limited to 2013, are provided, with an emphasis on fabrication, modification, and versatile applications. Several emerging application areas not previously summarized, including electrochromic devices, supercapacitors, electrochemical and electrochemiluminescent sensors, are discussed in detail. The challenges and prospects in these fields are also addressed.

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“…Electrolytes are fundamental components in diverse electrochemical devices, such as lithium ion batteries, electrolyte‐gated transistors, electrical skins, and electrochemical (e.g., electrochromic (EC) or electrochemiluminescence (ECL)) displays. Ionic conductivity and mechanical robustness are two important metrics to evaluate electrolytes .…”

Section: Introductionmentioning

confidence: 99%

Mechanically Robust, Highly Ionic Conductive Gels Based on Random Copolymers for Bending Durable Electrochemical Devices

Seo

Moon

2018

Adv Funct Materials

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Mechanically robust, highly ionic conductive gels based on a random copolymer of poly[styrene-ran-1-(4-vinylbenzyl)-3-methylimidazolium hexafluorophosphate] (P[S-r-VBMI][PF 6 ]) and the ionic liquid 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([EMI][TFSI]) are successfully prepared. The gels with either homo P[VBMI][PF 6 ] or conventional PS-block-poly(methyl methacrylate)-block-PS (SMS) show significant trade-off between ionic conductivity and mechanical resilience. In contrast, the P[S-r-VBMI][PF 6 ]-based gels exhibit both large elastic modulus (≈0.105 MPa) and ionic conductivity (≈1.15 mS cm −1 ) at room temperature. To demonstrate that these materials can be used as solid-state electrolytes, the ion gels are functionalized by incorporating electrochromic (EC) chromophores (ethyl viologen, EV 2+ ) and are applied to EC devices (ECDs). The devices show low-voltage operation, large optical transmittance variation, and good cyclic coloration/bleaching stability. In addition, flexibleECDs are fabricated to take advantage of the mechanical properties of the gels. The ECDs have excellent bending durability under both compressive and tensile strains. The versatile P[S-r-VBMI][PF 6 ]-based gel is anticipated to be of advantage in flexible electrochemical applications, such as batteries and electrochemical displays.

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Flexible Viologen Electrochromic Devices with Low Operational Voltages Using Reduced Graphene Oxide Electrodes

Cited by 102 publications

References 27 publications

Multiple-Stimuli Responsive Bioelectrocatalysis Based on Reduced Graphene Oxide/Poly(N-isopropylacrylamide) Composite Films and Its Application in the Fabrication of Logic Gates

Multiple-Stimuli Responsive Bioelectrocatalysis Based on Reduced Graphene Oxide/Poly(N-isopropylacrylamide) Composite Films and Its Application in the Fabrication of Logic Gates

Graphene as Transparent Electrodes: Fabrication and New Emerging Applications

Mechanically Robust, Highly Ionic Conductive Gels Based on Random Copolymers for Bending Durable Electrochemical Devices

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