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Aerogel based cathode material for lithium-sulfur battery

Schwan, Marina and Milow, Barbara and Wagner, Norbert and Warth, Frieder (2018) Aerogel based cathode material for lithium-sulfur battery. Seminar on Aerogels 2018, 24.-26.09.2018, Hamburg, Deutschland.

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Abstract

The exploitation of renewable energy resources and energy storage became an important issue in the last decades. The lithium-sulfur batteries are very attractive due to their very high theoretical specific capacity of 1675 mAh/g and very high specific energy density of 2500 Wh/kg. In addition to these values, sulfur is abundant on earth and inexpensive. With these benefits lithium-sulfur batteries are considered to be the next generation power source in advanced technologies. However, the poor cycle stability caused by polysulfide shuttle and side reactions reduces the active mass quantity resulting in decrease of capacity. Furthermore the volume expansion on the cathode side of about 80 % leads to crack formation and is referred to decrease of capacity. Carbon aerogels are promising materials to be used as cathode matrix for lithium-sulfur batteries. They are carbonized from organic resorcinol-formaldehyde aerogels and exhibit as a highly porous structure with porosities up to 98 %, high surface areas of around 500-3500 m²/ and large total pore volumes of around 2-3 cm³/g. In the presentation the influence of the pore structure and the pore volume distribution on the efficiency of such Li-S-battery systems will be discussed. In addition effects of pulverizing methods, such as ball mill and grinding, on the microstructure of the carbon aerogels will be addressed. The differences between carbon aerogels with different mechanical strength - from very hard to flexible - will be compared and analyzed for batteries application. The effects on the electrochemical properties of the built cells caused by the developed carbon aerogels will be presented.

Item URL in elib:https://elib.dlr.de/122367/
Document Type:Conference or Workshop Item (Speech)
Title:Aerogel based cathode material for lithium-sulfur battery
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Schwan, Marinamarina.schwan (at) dlr.dehttps://orcid.org/0000-0001-6329-8164
Milow, BarbaraBarbara.Milow (at) dlr.dehttps://orcid.org/0000-0002-6350-7728
Wagner, NorbertNorbert.Wagner (at) dlr.dehttps://orcid.org/0000-0002-2596-8689
Warth, Friederfrieder.warth (at) dlr.dehttps://orcid.org/0000-0003-4930-2491
Date:25 September 2018
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:lithium-Sulfur battery, carbon aerogels
Event Title:Seminar on Aerogels 2018
Event Location:Hamburg, Deutschland
Event Type:international Conference
Event Dates:24.-26.09.2018
Organizer:ISASF
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Transport System
DLR - Research area:Transport
DLR - Program:V VS - Verkehrssystem
DLR - Research theme (Project):V - Energie und Verkehr
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > Aerogele
Deposited By: Schwan, Marina
Deposited On:08 Nov 2018 09:52
Last Modified:20 Nov 2018 09:18

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