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The Effect of Pore Size on the Performance of the Li-O2 Battery
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Materials Chemistry, Structural Chemistry.ORCID iD: 0000-0003-2538-8104
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Structural Chemistry.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Materials Chemistry, Structural Chemistry.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Structural Chemistry. (Strukturkemi)ORCID iD: 0000-0003-4440-2952
2010 (English)In: ECS Transactions, ISSN 1938-5862, E-ISSN 1938-6737, Vol. 25, no 35, p. 121-127Article in journal (Refereed) Published
Abstract [en]

Lithium-airbatteries are complex electrochemical systems. This study deals with thecomposite cathode, where oxygen is reduced and different lithium-oxygen speciesare formed as reaction products. The amount of stored reactionproduct and thus the battery capacity is known to dependon surface area and pore-volume in the cathode. Here therole of pore size is studied for three different carbonsand their corresponding composite cathode films. Gas adsorption studies showthat film-forming Kynar polymer is blocking micropores and mesopores below~300 Å. This influences battery performance of the high surfacearea carbon, containing micropores only, where the capacity is shownto be negligible. The two other carbons, with wider pore-sizedistributions, show a battery capacity in the order of 1300-1500mAh/g carbon. This shows that it is vital to consideralso the pore size in the cathode film for agood battery performance.

Place, publisher, year, edition, pages
The Electrochemical Society , 2010. Vol. 25, no 35, p. 121-127
National Category
Inorganic Chemistry
Research subject
Chemistry with specialization in Inorganic Chemistry
Identifiers
URN: urn:nbn:se:uu:diva-139519DOI: 10.1149/1.3414010OAI: oai:DiVA.org:uu-139519DiVA, id: diva2:381505
Funder
StandUp
Available from: 2010-12-27 Created: 2010-12-27 Last updated: 2017-12-30

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Publisher's full texthttp://ecst.ecsdl.org/content/25/35/121

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Younesi, RezaUrbonaite, SigitaEdström, Kristina

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