Silica-templated ordered mesoporous carbon thin films as electrodes for micro-capacitors

Leyva-García, S.; Lozano‐Castelló, Dolores; Morallón, Emilia; Cazorla‐Amorós, Diego

doi:10.1039/c5ta10552h

Cited by 49 publications

(21 citation statements)

References 69 publications

(96 reference statements)

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“…As in PAS method, the ratio of 2ϒ photon reflects the collision frequency with pore walls, which affects the Ps lifetime, therefore, the porosity properties can be derived . Tang et al have used PALS method to explore the pore interconnectivity of porous silica thin film, a frequently used template for porous carbon electrodes . The Ps 3γ‐annihilation fraction was highly related to the diffusion of Ps, the diffusion of which was governed by the interconnectivity of the porous silica thin‐film.…”

Section: Design Considerations and Performance Metrics For Microsupermentioning

confidence: 99%

Graphene‐Based Planar Microsupercapacitors: Recent Advances and Future Challenges

Liang

Mondal

Wang

et al. 2018

Adv Materials Technologies

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The continuous development of integrated electronics such as maintenance‐free biosensors, remote and mobile environmental sensors, wearable personal electronics, nanorobotics etc. and their continued miniaturization has led to an increasing demand for miniaturized energy storage units. Microsupercapacitors with graphene electrodes hold great promise as miniaturized, integrated power sources thanks to their fast charge/discharge rates, superior power performance, and long cycling stability. In addition, planar interdigitated electrodes also have the capability to reduce ion diffusion distances leading to a greatly improved electrochemical performance. Either as standalone power sources or complementing energy harvesting units, it is expected that graphene‐based microsupercapacitors will play a key role as miniaturized power sources in electronic microsystems. This review highlights the recent development, challenges, and perspectives in this area, with an emphasis on the link between material and geometry design of planar graphene‐based electrodes and their electrochemical performance and integrability.

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Section: Design Considerations and Performance Metrics For Microsupermentioning

confidence: 99%

Graphene‐Based Planar Microsupercapacitors: Recent Advances and Future Challenges

Liang

Mondal

Wang

et al. 2018

Adv Materials Technologies

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“…While nanocasting is very versatile in terms of approachable pore structures and material morphologies, thin‐film engineering of hard‐templated OMCs is rather challenging. As one example, Levi‐García et al reported the synthesis of an ordered mesoporous silica thin film with mesopores of around 8 nm in size perpendicularly disposed to a graphite substrate followed by nanocasting transformation to an OMC thin film with mesopore sizes in the range of 2–3 nm ( Figure A) . Applications of hard‐templated carbon thin films are mainly located in the fields of electrochemical energy storage, electrocatalysis (e.g., in fuel cells) , or in gas sensing .…”

Section: Controlled Synthesis Of Nanoporous Carbon Thin Films and Appmentioning

confidence: 99%

“…As one example, Levi‐García et al reported the synthesis of an ordered mesoporous silica thin film with mesopores of around 8 nm in size perpendicularly disposed to a graphite substrate followed by nanocasting transformation to an OMC thin film with mesopore sizes in the range of 2–3 nm ( Figure A) . Applications of hard‐templated carbon thin films are mainly located in the fields of electrochemical energy storage, electrocatalysis (e.g., in fuel cells) , or in gas sensing . Nevertheless, synthesis of binder‐free carbon thin films with well‐ordered mesopores and high mechanical stability remains complicated with the nanocasting approach.…”

Section: Controlled Synthesis Of Nanoporous Carbon Thin Films and Appmentioning

confidence: 99%

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Bringing Porous Organic and Carbon‐Based Materials toward Thin‐Film Applications

Wuttke

Medina

Rotter

et al. 2018

Adv Funct Materials

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Porous materials have attracted tremendous scientific and industrial interest due to their broad commercial applicability. However, some applications require that these materials are deposited on surfaces to create thin films. Here, the recent progress of new porous thin-film material classes is described: porous organic molecular materials, porous organic polymers, covalent organic frameworks, and nanoporous carbon. In each case, the state of the art and current barriers in their thin-film fabrication, as well as intrinsic material advantages that are suited for different applications are presented. By highlighting the unique structural characteristics and properties of these materials, it is hoped that increased research development and industrial interest will be fostered, which will lead to new methods of thin-film synthesis and consequently to new applications. Figure 2. 1) Structure, crystal packing and BET surface area of triptycene trisbenzimidazolone (TTBI), 2) structure and BET surface area of OMIM-10-14, 3) structure of Doonan cage C1 and BET surface area of the two different crystalline polymorphs obtained by slow and fast precipitation, 4) structure and BET surface area of a triptycene-based cage, 5) structure of Cooper Cage CC3 (cyclohexyl vertices). A) Schematic low-energy crystal packings for CC1 (hydrogens on vertices; formally nonporous), CC2 (methyl vertices; 1D external pore channels), and CC13 (dimethyl vertices; 2D layered pore structure with formally disconnected voids). As such, small structural changes to the vertex groups lead to three quite different crystal packings and pore topologies for the α polymorphs shown here (orange = disconnected voids; yellow = interconnected pores). Crystallization in the presence of 1,4-dioxane causes pseudoisostructural window-to-window packing for all three cage modules, causing the materials to mimic the 3D diamondoid pore structure of CC3 shown in D. B) N 2 sorption isotherms (77 K) for homochiral CC3 produced by freeze-drying (green diamonds, 6 repetitions), vacuum evaporation (blue triangles), standard reaction (black squares), and slow crystallization (red circles, 6 repetitions). C,D) Molecular simulation of amorphous packing (top) and crystalline structure (bottom) of CC3, with the Connolly surface probed by N 2 molecules (kinetic diameter of 3.64 Å) shown in blue, and average BET surface area extracted from the isotherms shown in (B). 1) Reproduced with permission. [58] Figure 12. A) CDC thin-film synthesis and EDLC test cell preparation. Titanium is extracted from titanium carbide as TiCl 4 , forming a porous carbon film. Two carbide plates with the same CDC coating thickness are placed face to face and separated by a polymer fabric soaked with electrolyte. The SEM image (left) shows a representative image of a CDC/TiC interface with a good film adhesion. Reproduced with permission. [187]

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“…Since the discovery of mesoporous silica in 1990s, [13] ad iverse range of porous powders and films has been produced through hard-(e.g.,o rdered mesoporous silica, latex polymer beads) [14][15][16][17] and soft-templating (e.g.,s urfactants, triblock copolymers) [18][19][20][21][22][23][24][25] approaches. The templates can be removed by decomposition (calcination) with as tructuralt ension.…”

Section: Introductionmentioning

confidence: 99%

Analytical Understanding of the Materials Design with Well‐Described Shrinkages on Multiscale

Dutta

et al. 2018

Chemistry A European J

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Shrinkages derived from condensation of frameworks are one of the significant steps for fabricating demanded materials having unique morphologies and properties. Enormous efforts have been dedicated to understanding their mechanisms that are quite useful for the materials design. In this context, diversified measuring and observing tools have been facilitated to evaluate structural contractions and corresponding driving forces. All of the investigations are crucial to encourage the utilization of such shrinkages for the precise design of nanomaterials. In this review, we summarize significant works how to analyze shrinkages in multiscale during the synthesis of materials, which will be useful as a follow-up review to our latest contribution. Well-defined porous materials are also selected as a good candidate for understanding well-described shrinkages. This review aims to provide a detailed glimpse of the development of analyses on shrinking behaviors in multiscale for the materials design. Shrinking degree and direction in multiscale, which are driven by condensation of frameworks, are predominant for understanding and/or predicting final nanostructures of materials after shrinkages.

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Silica-templated ordered mesoporous carbon thin films as electrodes for micro-capacitors

Abstract: High performance electrodes for micro-capacitors were synthesized by tuning thickness and porosity of mesoporous carbon and composite silica/carbon thin films.

Cited by 49 publications

References 69 publications

Graphene‐Based Planar Microsupercapacitors: Recent Advances and Future Challenges

Graphene‐Based Planar Microsupercapacitors: Recent Advances and Future Challenges

Bringing Porous Organic and Carbon‐Based Materials toward Thin‐Film Applications

Analytical Understanding of the Materials Design with Well‐Described Shrinkages on Multiscale

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