Schwan, Marina and Kröner, Jessica and Schonvogel, Dana and Nojabaee, Maryam and Milow, Barbara (2023) Carbon aerogels for electrochemical applications. Helmholtz Energy Conference 2023, 12.-13.06.2023, Koblenz.
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Abstract
Carbon aerogels are highly-porous, electrically conductive materials with tunable micro- and mesoporosity as well as surface area and envelope density. Their properties are dictated from sol-gel process of their organic precursors and carbonization conditions. Due to their well adjustable properties, they became very attractive in many fields of applications, such as CO2 capture, catalyst in fuel cells, or as electrodes for supercapacitors and batteries. Energy and power-storage capability of supercapacitors are associated with the physical and chemical characteristics of carbon-based electrodes. Cyclic voltammetry and galvanostatic charge/discharge measurements demonstrate the good electrochemical performance of the supercapacitor with carbon aerogels. A specific capacitance of 21.8 F·g−1 at 2 A·g−1 and cycle durability of 87% over 10,000 cycles was observed due to the presence of dual mesopores. These dual mesopores result in an enhanced access to reaction sites and facilitate electrolyte ion transport. [1] Ultramicroporous (pores smaller 1 nm) carbon aerogels as conductive matrices embedding sulfur for cathode application in lithium–sulfur batteries are able to suppress the polysulfide shuttle effect, maintaining 80% (about 1000 mA·h·g(S)−1) and 70% (about 800 mA·h·g(S)−1) of the initial discharge capacity after 200 cycles at a rate of 0.3C in carbonate and ether-based electrolytes, respectively. At a faster rate of 2C in both electrolyte systems aerogel-based cathode can still deliver a discharge capacity of at least mA·h·g(S)−1. [2] The mesoporous carbon aerogels can be considered as promising cathode catalysts for application in polymer electrolyte membrane fuel cells. The platinum free carbon aerogels contain catalytic active Fe-Nx sites and demonstrate suitable microstructure for enhanced electrocatalytic performance. 1. Park, D.-W., et al., A dual mesopore C-aerogel electrode for a high energy density supercapacitor. Current Applied Physics, 2016. 16(6): p. 658-664. 2. Nojabaee, M., et al., Ultramicroporous carbon aerogels encapsulating sulfur as the cathode for lithium–sulfur batteries. Journal of Materials Chemistry A, 2021. 9: p. 6508-6519.
Item URL in elib: | https://elib.dlr.de/195616/ | ||||||||||||||||||||||||
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Document Type: | Conference or Workshop Item (Speech) | ||||||||||||||||||||||||
Title: | Carbon aerogels for electrochemical applications | ||||||||||||||||||||||||
Authors: |
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Date: | 12 June 2023 | ||||||||||||||||||||||||
Refereed publication: | Yes | ||||||||||||||||||||||||
Open Access: | No | ||||||||||||||||||||||||
Gold Open Access: | No | ||||||||||||||||||||||||
In SCOPUS: | No | ||||||||||||||||||||||||
In ISI Web of Science: | No | ||||||||||||||||||||||||
Status: | Published | ||||||||||||||||||||||||
Keywords: | Carbon aerogels, energy storage, metal-sulfur batteries, supercaps | ||||||||||||||||||||||||
Event Title: | Helmholtz Energy Conference 2023 | ||||||||||||||||||||||||
Event Location: | Koblenz | ||||||||||||||||||||||||
Event Type: | national Conference | ||||||||||||||||||||||||
Event Dates: | 12.-13.06.2023 | ||||||||||||||||||||||||
Organizer: | HH | ||||||||||||||||||||||||
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 Institute of Engineering Thermodynamics > Electrochemical Energy Technology | ||||||||||||||||||||||||
Deposited By: | Schwan, Marina | ||||||||||||||||||||||||
Deposited On: | 26 Jun 2023 10:19 | ||||||||||||||||||||||||
Last Modified: | 26 Jun 2023 10:19 |
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