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Carbon aerogels - promising materials for fuel cell applications

Schettler, Jessica and Schwan, Marina and Milow, Barbara (2022) Carbon aerogels - promising materials for fuel cell applications. Workshop on High Temperature Polymer Electrolyte Membrane Fuel Cell Technology, 22.-24.06.2022, Bad Zwischenahn, Deutschland.

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Abstract

Carbon aerogels, first introduced by Richard Pekala in 1989, are three-dimensional, open porous solid materials produced via carbonization of organic aerogels based on e.g. resorcinol-formaldehyde, phenol-formaldehyde or melamine-formaldehyde polymers. The synthesis parameters of organic aerogels such as pH-value, the amount of catalyst, the molar ratios of educts, temperature influence the formation of the microstructure of aerogels significantly. The microstructure, in turn, is reflected in properties of aerogels. An increase in pH during stirring leads to the formation of small particles. Differences in the molar ratios of the reactants affect the connectivity between the particles and have a corresponding direct effect on the electrical properties of the aerogel. The final structure of carbon aerogel depends very critically on carbonization process, e.g. temperature, duration, gases. Unique properties of carbon aerogels such as well-controlled porosity and pore size, large specific surface area about 500-2000 m²/g, high electrical conductivity, and low envelope density make them promising material for application in adsorption, catalysis, supercapacitors, fuel cells or as a cathode host in metal-sulfur cells. Their remarkable electrical conductivity is one of the key factors for electrochemical applications. The open-pore network with adjustable microstructure offers a high level of freedom in material design to specifically adapt the carbon matrix to the requirements of the electrode. Within the presentation we will report on the properties of carbon aerogel materials and dependences of the synthesis and carbonization routines.

Item URL in elib:https://elib.dlr.de/188988/
Document Type:Conference or Workshop Item (Poster)
Title:Carbon aerogels - promising materials for fuel cell applications
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Schettler, JessicaUNSPECIFIEDUNSPECIFIED
Schwan, MarinaUNSPECIFIEDUNSPECIFIED
Milow, BarbaraUNSPECIFIEDhttps://orcid.org/0000-0002-6350-7728
Date:2022
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Carbon aerogels, nitrogen doping, Synthesis
Event Title:Workshop on High Temperature Polymer Electrolyte Membrane Fuel Cell Technology
Event Location:Bad Zwischenahn, Deutschland
Event Type:Workshop
Event Dates:22.-24.06.2022
HGF - Research field:Energy
HGF - Program:Materials and Technologies for the Energy Transition
HGF - Program Themes:Electrochemical Energy Storage
DLR - Research area:Energy
DLR - Program:E VS - Combustion Systems
DLR - Research theme (Project):E - Materials for Electrochemical Energy Storage
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > Aerogels and Aerogel Composites
Deposited By: Schettler, Jessica
Deposited On:17 Oct 2022 08:25
Last Modified:17 Oct 2022 08:25

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