The Effect of Pore Size on the Performance of the Li-O2 Battery
2010 (English)In: ECS Transactions, ISSN 1938-5862, Vol. 25, no 35, 121-127 p.Article in journal (Refereed) Published
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.
Research subject Chemistry with specialization in Inorganic Chemistry
IdentifiersURN: urn:nbn:se:uu:diva-139519DOI: 10.1149/1.3414010OAI: oai:DiVA.org:uu-139519DiVA: diva2:381505