Carbon aerogels with improved flexibility by sphere templating |
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Authors: | Miralem Salihovic,Nicola Hü sing,Johannes Bernardi,Volker Presser,Michael S. Elsaesser |
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Affiliation: | Chemistry and Physics of Materials, University of Salzburg, 5020 Salzburg Austria, +43-662-8044-6262 ; USTEM, Vienna University of Technology, 1040 Vienna Austria ; INM – Leibniz Institute for New Materials, 66123 Saarbrücken Germany ; Saarland University, 66123 Saarbrücken Germany |
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Abstract: | Mechanically reversible compressible resorcinol–formaldehyde (RF) aerogels can be converted into mechanically reversible compressible carbon aerogels (CA) by carbonization in an inert atmosphere. By incorporation of polystyrene spheres into the RF gels as a sacrificial template, it is possible to create macropores with controlled size within the carbon framework during carbonization. The resulting templated carbon aerogel shows enhanced mechanical flexibility during compression compared to pristine samples. In addition, the presence of hierarchical porosity provides a porous architecture attractive for energy storage applications, such as supercapacitors.Using soft templating, mechanically reversible compressible resorcinol–formaldehyde aerogels can be converted into mechanically reversible compressible carbon aerogels with high surface area by carbonization in an inert atmosphere. |
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