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Dynamic Electrosorption Analysis as an Effective Means to Characterise the Structure of Bulk Graphene Assemblies

Identifieur interne : 002C61 ( Main/Exploration ); précédent : 002C60; suivant : 002C62

Dynamic Electrosorption Analysis as an Effective Means to Characterise the Structure of Bulk Graphene Assemblies

Auteurs : Junwu Zhu [Australie, République populaire de Chine] ; Chi Cheng [Australie] ; Xiaowei Yang [Australie] ; Yufei Wang [Australie] ; Ling Qiu [Australie] ; Dan Li [Australie, États-Unis]

Source :

Chemistry – A European Journal [ 0947-6539 ] ; 2013-02-25.

RBID : ISTEX:7B6ACC5A24EB4AF62EDF24CEBB8D3D5EE5BB5D9A

English descriptors

Abstract

Restacking of graphene sheets to a graphite‐like structure is a prevailing problem that is known to compromise the performance of individual graphene sheets in an assembled bulk form. To address this common problem efficiently and monitor the structure and quality of graphene products comprehensively, it is highly desirable to develop reliable metrology techniques for characterising graphene‐based materials on a bulk assembly level and in a quantitative manner. Here, by revisiting the physicochemical principle of electrosorption, we propose a simple electrochemical approach, namely dynamic electrosorption analysis (DEA), as an easily accessible and effective technique for evaluation of the self‐stacking behaviour of graphene. Taking multilayered chemically converted graphene films as a model, we demonstrate that the DEA technique can effectively reveal very subtle variation in accessible surface area and pore size of graphene assemblies in the liquid phase and thus can provide useful insights to the experimental design relating to restacking control. This work also reveals the huge effect some routine processing conditions, such as heat treatment and drying, can have on the structure and performance of graphene‐based bulk materials, providing useful guidance for future manufacturing of this class of materials.

Url:

https://api.istex.fr/document/7B6ACC5A24EB4AF62EDF24CEBB8D3D5EE5BB5D9A/fulltext/pdf

DOI: 10.1002/chem.201203219

Affiliations:

Australie, République populaire de Chine, États-Unis

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Le document en format XML

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<term>Quantitative manner</term>
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<term>Samples annealed</term>
<term>Samples drop</term>
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<term>Adsorption</term>
<term>Ambient conditions</term>
<term>Annealed</term>
<term>Annealing</term>
<term>Aqueous solution</term>
<term>Assembly structure</term>
<term>Average pore size</term>
<term>Bulk forms</term>
<term>Bulk graphene assemblies</term>
<term>Bulk materials</term>
<term>Capacitance</term>
<term>Capacitance values</term>
<term>Carbon materials</term>
<term>Cellulose esters filter membrane</term>
<term>Certain amount</term>
<term>Characterisation</term>
<term>Characteristic relaxation time</term>
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<term>Corrugation</term>
<term>Current density</term>
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<term>Different temperatures</term>
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<term>Graphene sheets</term>
<term>Gravimetric capacitances</term>
<term>Hydrothermal</term>
<term>Hydrothermal treatment</term>
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<term>Restacking</term>
<term>Same amount</term>
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<term>Samples drop</term>
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<term>Structural difference</term>
<term>Structural variation</term>
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<term>Supercapacitors</term>
<term>Surface area</term>
<term>Thermal annealing</term>
<term>Vacuum filtration</term>
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<front><div type="abstract" xml:lang="en">Restacking of graphene sheets to a graphite‐like structure is a prevailing problem that is known to compromise the performance of individual graphene sheets in an assembled bulk form. To address this common problem efficiently and monitor the structure and quality of graphene products comprehensively, it is highly desirable to develop reliable metrology techniques for characterising graphene‐based materials on a bulk assembly level and in a quantitative manner. Here, by revisiting the physicochemical principle of electrosorption, we propose a simple electrochemical approach, namely dynamic electrosorption analysis (DEA), as an easily accessible and effective technique for evaluation of the self‐stacking behaviour of graphene. Taking multilayered chemically converted graphene films as a model, we demonstrate that the DEA technique can effectively reveal very subtle variation in accessible surface area and pore size of graphene assemblies in the liquid phase and thus can provide useful insights to the experimental design relating to restacking control. This work also reveals the huge effect some routine processing conditions, such as heat treatment and drying, can have on the structure and performance of graphene‐based bulk materials, providing useful guidance for future manufacturing of this class of materials.</div>
</front>
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Dynamic Electrosorption Analysis as an Effective Means to Characterise the Structure of Bulk Graphene Assemblies

Dynamic Electrosorption Analysis as an Effective Means to Characterise the Structure of Bulk Graphene Assemblies

Source :

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

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Pour mettre un lien sur cette page dans le réseau Wicri