Crystal Structure and High Performance of LiMn System Oxides as a Cathode Material for Lithium Ion Secondary Battery

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  • IDEMOTO Yasushi
    Department of Pure and Applied Chemistry, Faculty of Science & Technology, Tokyo University of Science
  • ITO Yuka
    Department of Pure and Applied Chemistry, Faculty of Science & Technology, Tokyo University of Science
  • KOURA Nobuyuki
    Department of Pure and Applied Chemistry, Faculty of Science & Technology, Tokyo University of Science

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Other Title
  • 新機能材料開発と構造科学　　１．構造と機能　　リチウムイオン二次電池用ＬｉＭｎ系正極材料の構造と高性能化
  • リチウム イオン 2ジ デンチヨウ LiMnケイ セイキョク ザイリョウ ノ コウゾウ ト コウセイノウカ

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Abstract

We investigated the relation between crystal structure, electronic states and electrode performance of LiMn2-xMxO4 (M = Zn, Ni etc.) as cathode materials for lithium ion secondary batteries. The cycle performance is improved by substitution of Mn with M. The crystal structure was determined by Rietveld analysis using powder neutron diffraction. The electron density distribution was obtained by XRD using MEM/Rietveld method. From the results, the stability of the host structure is important for cycle performance.

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