Journal
BULLETIN OF THE KOREAN CHEMICAL SOCIETY
Volume 31, Issue 11, Pages 3221-3224Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.5012/bkcs.2010.31.11.3221
Keywords
Li-air battery; Air electrode; Cathode requirements
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Funding
- KIST
- Ministry of Knowledge Economy, Republic of Korea [2008EEL11P0800002009]
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This study investigates the requirements of lithium-air cathodes, which directly influence discharge capacity The cathodes of Li-air cell are made by using five different carbon materials, such as Ketjen black EC600JD, Super P, Ketjen black EC300JD, Denka black, and Ensaco 250G The Ketjen black EC600JD provides discharge capacity of 2600 mAh/g per carbon weight, while that of Ensaco 2500 shows only 579 mAh/g To figure out the differences of discharge capacity from carbon materials, their surface area and pore volume are analyzed These are found out to be the critical factors in determining discharge capacity Furthermore, carbon loading on Ni foam and amounts of electrolyte are significant factors that affect discharge capacity In order to investigate catalyst effect, electrolytic manganese dioxide (EMD) is incorporated and delivered 4307 mAh/g per carbon weight This infers that EMD facilitates to break O-2 interactions and leads to enhance discharge capacity
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