Li utilization and cyclability of Li-O2 rechargeable batteries incorporating a mesoporous Pd/β-MnO2 air electrode

Il Chan Jang, Shintaro Ida, Tatsumi Ishihara

研究成果: Contribution to journalArticle

2 引用 (Scopus)

抜粋

The effects of Li utilization on the capacity and cycle stability of Li-O2 batteries were studied by investigating the performance of cells incorporating varying ratio of Li metal to air electrode catalyst. The quantity of Li metal was found to affect the overall discharge capacity, such that the capacity decreased with decreasing amounts of Li in the anode. Although a capacity of only 354 mAhg-1 (cathode) was obtained when the anode contained 0.9mg Li, almost 100% of the Li in the cell was consumed during discharge, which corresponds to a capacity of 3932 mAhg-1 (Li). The cycle stability of cells operating under high Li utilization conditions was, however, significantly reduced. Detailed analysis of the Li distribution in the cell suggests that decreased usage of Li within the first few cycles is the cause of the poor cycle stability. The results of this study suggest that low cycle stability in a Li-O2 battery may be attributed to the formation of a surface passivation layer on the Li metal composed primarily of Li 2CO3 and ROCO2Li and generated by reaction with the electrolyte.

元の言語英語
ページ(範囲)267-272
ページ数6
ジャーナルElectrochemistry
82
発行部数4
DOI
出版物ステータス出版済み - 4 2014

All Science Journal Classification (ASJC) codes

  • Electrochemistry

フィンガープリント Li utilization and cyclability of Li-O<sub>2</sub> rechargeable batteries incorporating a mesoporous Pd/β-MnO<sub>2</sub> air electrode' の研究トピックを掘り下げます。これらはともに一意のフィンガープリントを構成します。

  • これを引用