Low temperature synthesis and electrochemical characteristics of LiFeO2 cathodes

Yoji Sakurai, Hajime Arai, Shigeto Okada, Jun Ichi Yamaki

研究成果: Contribution to journalArticle査読

96 被引用数 (Scopus)

抄録

Two rechargeable polymorphs of LiFeO2 have been synthesized at low temperatures of less than 250 °C via a novel H+/Li+ ionic-exchange reaction in an alcoholic solution using stoichiometric amounts of lithium alkoxide and iron oxyhydroxide as the starting materials. The reaction, which proceeded in a topotactic manner, resulted in new polymorphs in the LiFeO2 family with similar crystal structures to the parent materials. Two types of LiFeO2, the corrugated layer and goethite type, were rechargeable in lithium cells with a cycling capacity of 0.2-0.4 Li/LiFeO2 in the 1.5-4.5 V range, unlike the other six non-rechargeable polymorphs reported so far. A preliminary X-ray diffraction study on structural changes in the cathode during cycling showed a minimal lattice parameter change for corrugated layer LiFeO2 and a noticeable a-lattice shrinkage/expansion of about 1% for goethite-type LiFeO2.

本文言語英語
ページ(範囲)711-715
ページ数5
ジャーナルJournal of Power Sources
68
2
DOI
出版ステータス出版済み - 1 1 1997
外部発表はい

All Science Journal Classification (ASJC) codes

  • 再生可能エネルギー、持続可能性、環境
  • エネルギー工学および電力技術
  • 物理化学および理論化学
  • 電子工学および電気工学

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