Polyaniline/MoSX Supercapacitor by Electrodeposition

Wang, Yong; Mayorga‐Martinez, Carmen C.; Pumera, Martin

doi:10.1246/bcsj.20170076

Cited by 45 publications

(21 citation statements)

References 52 publications

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“…G−CN also displayed a better performance as electrode material for supercapacitor, with higher capacitance and much better rate capability. The great change in behaviour caused by a simple functionalization procedure may be of interest in the fine‐tuning of capacitance behaviour of similar materials,.…”

Section: Discussionmentioning

confidence: 99%

Cyanographene and Graphene Acid: The Functional Group of Graphene Derivative Determines the Application in Electrochemical Sensing and Capacitors

et al. 2018

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Well‐defined, stoichiometric derivatives of graphene afford many opportunities in fine‐tuning of graphene properties and hence, extend the application potential of this material. Here, we present the electrochemical properties of cyanographene (G−CN), and graphene acid (G−COOH) in order to understand the role of the covalently attached functional groups on the graphene sheet in electrochemical sensing for the detection of biomarkers. G−CN shows better performance for the negatively charged analytes ascorbic and uric acids when compared to G−COOH. The less‐favourable performance of G−COOH is explained by repulsion between negatively charged analytes and negatively charged functional groups of G−COOH. The capacitance of both materials is in a comparable range, but chronopotentiometry reveals that G−CN shows a greater capacitance than G−COOH. The identified differences in electrochemical properties imprinted by the functional group show that its chemical nature can be exploited in fine‐tuning of the selectivity of electrochemical sensing and energy storage applications.

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Section: Discussionmentioning

confidence: 99%

Cyanographene and Graphene Acid: The Functional Group of Graphene Derivative Determines the Application in Electrochemical Sensing and Capacitors

et al. 2018

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“…Aerogels may be strengthened through proper organic-inorganic hybridization strategies [4]. Supercapacitors may be created [5]. Organic-inorganic hybrid perovskites (e.g., CH 3 NH 3 PbI 3 ), with advantages of easy processing, tunable bandgaps, and superior charge-transfer properties, have emerged as a new class of revolutionary optoelectronic semiconductors promising for various applications [6].…”

Section: Introductionmentioning

confidence: 99%

Effects of post cure treatment in the glass transformation range on the structure and fire behavior of in situ generated silica/epoxy hybrids

Bifulco

Tescione

Capasso

et al. 2018

J Sol-Gel Sci Technol

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Effects of post cure treatment in the glass transformation range on the structure and fire behavior of in situ generated silica/epoxy hybrids Abstract A new "in situ" sol-gel synthesis procedure was exploited to produce silica/epoxy nanocomposites with 6 wt.% maximum silica content. 3-Aminopropyltriethoxysilane (APTS) was used as a coupling agent. The experimental results (fouriertransform infrared spectroscopy, FTIR, small-angle X-ray scattering, SAXS, transmission electron microscopy, TEM, nuclear magnetic resonance, NMR, and dynamic mechanical analysis, DMA) support that the structure consists of nanosized silica particles (maximum 1.25 nm in size) embedded in a hybrid co-continuous network. A post cure non-isothermal heating from 15 to 100°C (beyond the Tg of the neat epoxy) caused Tg and storage modulus to increase. The fire behavior, that, owing to severe regulations (i.e., in aerospace engineering), often prevents composites applications, was also studied. The formed silica domains prevented melt dripping phenomena during vertical flame spread tests. Cone calorimetry tests showed a remarkable decrease of the heat release rate (HRR) for all the hybrid systems with respect to the neat cured resin, even at very low silica loadings (i.e., 2 wt.%). This decrease was much more pronounced for the hybrid structures that were not subjected to the post cure thermal treatment. The use of multiple structural investigation techniques allowed to choose among multiple hypothesis and conclude that nanoparticles clustering is the main reason of the effects of the post curing treatments. Graphical Abstract SAXS of the samples before (EPO) and after (EPO_t) post cure thermal treatment in the glass transformation range. Effect of the post cure on the glass transformation temperature (Tg) and heat release rate (HRR) Photos of samples EPO and EPO 2% Si after vertical flame spread tests Highlights• A hybrid co-continuous network embedding nanoparticles (maximum 1.25 nm in size) was obtained;• A post-cure was performed above the glass transformation temperature, T g , of neat epoxy;• The post cure makes T g , storage modulus and Heat Release Rate (HRR) to increase;• No dripping in flame test and up to 40% HRR reduction for only 2 wt.% silica content is observed;• The post cure effects depend on nanoparticles clustering in the glass transformation range.

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“…This covers the elemental analogues of graphene like pnictogens, silicene, as well as a broad family of compound materials including layered chalcogenides, nitrides, carbides and many others. The chemical modifications of 2D materials can in general significantly extend the scope of their applications –…”

Section: Discussionmentioning

confidence: 99%

Chemistry of Graphene Derivatives: Synthesis, Applications, and Perspectives

Šturala

Luxa

Pumera

et al. 2018

Chemistry A European J

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106

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The chemistry of graphene and its derivatives is one of the hottest topics of current material science research. The derivatisation of graphene is based on various approaches, and to date functionalization with halogens, hydrogen, various functional groups containing oxygen, sulfur, nitrogen, phosphorus, boron, and several other elements have been reported. Most of these functionalizations are based on sp hybridization of carbon atoms in the graphene skeleton, which means the formation of out-of-plane covalent bonds. Several elements were also reported for substitutional modification of graphene, where the carbon atoms are substituted with atoms like nitrogen, boron, and several others. From tens of functional groups, for only two of them were reported full functionalization of graphene skeleton and formation of its stoichiometric counterparts, fluorographene and hydrogenated graphene. The functionalization of graphene is crucial for most of its applications including energy storage and conversion devices, electronic and optic applications, composites, and many others.

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Polyaniline/MoSX Supercapacitor by Electrodeposition

Cited by 45 publications

References 52 publications

Cyanographene and Graphene Acid: The Functional Group of Graphene Derivative Determines the Application in Electrochemical Sensing and Capacitors

Cyanographene and Graphene Acid: The Functional Group of Graphene Derivative Determines the Application in Electrochemical Sensing and Capacitors

Effects of post cure treatment in the glass transformation range on the structure and fire behavior of in situ generated silica/epoxy hybrids

Chemistry of Graphene Derivatives: Synthesis, Applications, and Perspectives

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