リチウムイオン電池用ニッケル酸リチウム正極の研究  [in Japanese] A study on lithium nickelate as positive electrodes for lithium-ion batteries  [in Japanese]

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Author(s)

Abstract

現行のコバルト酸リチウムLiCoO_2に変わるリチウムイオン電池用の正極材料として、より安価で資源豊富なニッケルを用いる、LiNiO_2の合成と特性評価を行った。放電特性は、LiNiO_2の層構造中のリチウム層へのニッケル混入が少ないほど良好であった。出発物質としてリチウム化合物を過剰に混合して焼成し、未反応リチウムを水洗除去する方法により、ニッケル混入を1%以下に抑えることができ、LiCoO_2の1.5倍以上の放電容量を達成することができた。またニッケルの一部をコバルトで置換すると、良好なサイクル特性が得られることを示した。

Several compounds of lithium nickelate was examined as inexpensive and abundant positive electrode materials for lithium-ion batteries. Their discharge characteristics were mostly affected by the amount of nickel in the lithium layer of the layered structure of LiNiO_2. When synthesized by a novel synthetic process, called "excess lithium method", the product has little nickel in the lithium layer and showed a discharge capacity of 1.5 times larger than that of conventional material LiCoO_2 Its cobalt substitutives exhibited an excellent charge-discharge cycle performance. Lithium-ion batteries with these nickelate electrodes are promising as high energy-density power sources.

Journal

  • Technical report of IEICE. Energy engineering in electronics and communications

    Technical report of IEICE. Energy engineering in electronics and communications 97(465), 55-60, 1998-01-09

    The Institute of Electronics, Information and Communication Engineers

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Codes

  • NII Article ID (NAID)
    110003185597
  • NII NACSIS-CAT ID (NCID)
    AA11135980
  • Text Lang
    JPN
  • Article Type
    ART
  • Data Source
    CJP  NII-ELS 
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