Orientation alignment of epitaxial LiCoO2 thin films on vicinal SrTiO3 (100) substrates

Kazunori Nishio, Tsuyoshi Ohnishi, Kazutaka Mitsuishi, Narumi Ohta, Ken Watanabe, Kazunori Takada

研究成果: Contribution to journalArticle査読

6 被引用数 (Scopus)

抄録

LiCoO2 is epitaxially grown on SrTiO3 (100) substrates with (104) orientation. Because the LiCoO2 film is grown with its c-axis parallel to four equivalent 〈111〉 axes of the SrTiO3, the (104)-oriented film exhibits four-domain structure on the SrTiO3 (100) substrate. Introducing off-cut angle to the substrate surface breaks the equivalency between the four 〈111〉 axes of the SrTiO3 substrate to induce preferential growth of specific orientation with the c-axis in a descending direction of off-cut surface. Increasing off-cut angle and lowering deposition rate promote the preferential growth, because they facilitate step-flow growth mode, and finally align the c-axes in the domains completely into one 〈111〉 direction of the SrTiO3 substrate. The LiCoO2 film delivers a discharge capacity of 90 mAh g−1 at a low discharge rate of 0.01 C, and 25% of capacity is kept even at a high rate of discharge with 100 C.

本文言語英語
ページ(範囲)306-310
ページ数5
ジャーナルJournal of Power Sources
325
DOI
出版ステータス出版済み - 9 1 2016
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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