Electrochemical performances of lithium-air cell with carbon materials

C. K. Park, S. B. Park, S. Y. Lee, H. Lee, Ho Jang, W. I. Cho

Research output: Contribution to journalArticle

44 Citations (Scopus)

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 O2 interactions and leads to enhance discharge capacity.

Original languageEnglish
Pages (from-to)3221-3224
Number of pages4
JournalBulletin of the Korean Chemical Society
Volume31
Issue number11
DOIs
Publication statusPublished - 2010 Nov 20

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Keywords

  • Air electrode
  • Cathode requirements
  • Li-air battery

ASJC Scopus subject areas

  • Chemistry(all)

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