Headline: Development of Lithium Iron Oxide Cathode Materials for Lithium Secondary Batteries

DOI Web Site Web Site 参考文献41件
  • LEE Yun-S.
    Faculty of Applied Chemical Engineering, Chonnam National University
  • CHO Sung-J.
    Faculty of Applied Chemical Engineering, Chonnam National University
  • SUN Yang-K.
    Department of Chemical Engineering, Hanyang University
  • KOBAYAKAWA Koichi
    Department of Applied Chemistry, Kanagawa University
  • SATO Yuichi
    Department of Applied Chemistry, Kanagawa University

書誌事項

タイトル別名
  • Development of Lithium Iron Oxide Cathode Materials for Lithium Secondary Batteries

この論文をさがす

抄録

<p>Two lithium iron oxides have been synthesized at low temperatures by the conventional solid-state method. Orthorhombic LiFeO2 has been synthesized using LiOH and γ-FeOOH at 150°C was composed of orthorhombic LiFeO2 and small amount of spinel LiFe5O8 phases. A Li/LiFeO2 cell showed not only a fairly high initial discharge capacity of over 150 mAh g−1 but also a good cycle retention rate at room temperature. It was found that the orthorhombic phase of the LiFeO2 underwent a structural change to the LiFe5O8 spinel phase in the first cycle. Especially, it showed a severe structural change during the first discharge process, which might be the main reason for the capacity loss of the Li/LiFeO2 system. An amorphous-like LixFeyOz has been synthesized using LiOH and α-FeOOH at 200°C consisted of three kinds of structures, LiFe5O8, Li5FeO4, and a trace of cubic α-LiFeO2 A Li/LixFeyOz cell showed a very high initial discharge capacity (215 mAh g−l) as well as an excellent cycle retention rate (95%) from the 11th to the 50th cycle. It was found that LixFeyOz material was transformed into the spinel LiFe5O8 and tetragonal β-LiFeO2 phases after long-term cycling.</p>

収録刊行物

  • Electrochemistry

    Electrochemistry 73 (10), 874-882, 2005-10-05

    公益社団法人　電気化学会

参考文献 (41)*注記

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ