コバルト酸リチウム(LiCoO2)の構造研究

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  • コバルトサン リチウム LiCoO2 ノ コウゾウ ケンキュウ
  • The Structural Study of Lithium Cobalt Oxide

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We tried to make thinning of LiCoO2 crystal grains by atom-milling method for TEM observation, using the Selected Area Diffraction image (SAD), Bright Field image (BF), and High Resolution Electron Microscopic image (HREM). We also analyzed LiCoO2 structural details from these images. These TEM images suggested the coexistence of two-phase in a crystal grain. It was expected that layer structure and Spinel structure coexist on layer (300) and Spinel (844), from the discussion of the crystallographic relationship between the layer structure and the Spinel structure. It is conceivable that this Spinel structure is the same structure as LT-LiCoO2, although we could not observe directly the inter-phase boundary.

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