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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 Materials Chemistry, Structural Chemistry.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Materials Chemistry, Structural Chemistry.
2010 (English)In: ECS Transactions, ISSN 1938-5862, E-ISSN 1938-6737, Vol. 25, no 35, 121-127 p.Article 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, 121-127 p.
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: diva2:381505
Available from: 2010-12-27 Created: 2010-12-27 Last updated: 2017-12-11

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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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