Electrochemical Performances of Lithium-air Cell with Carbon Materials

Title
Electrochemical Performances of Lithium-air Cell with Carbon Materials
Authors
박창규박성빈이선영이현주장호조원일
Keywords
air electrode; carbon; electrochemical performance; morphology; Cathode requirements; Li-air battery
Issue Date
2010-11
Publisher
Bulletin of the Korean Chemical Society
Citation
VOL 31, NO 11, 3221-3224
Abstract
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 250G 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 O₂interactions and leads to enhance discharge capacity.
URI
http://pubs.kist.re.kr/handle/201004/40948
ISSN
0253-2964
Appears in Collections:
KIST Publication > Article
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