Investigation of Moderately Low Temperature Al/Fe<SUB>2</SUB>, Secondary Cells

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  • TAKAMI Norio
    Department of Industrial Chemistry, Tokyo University of Science
  • KOURA Nobuyuki
    Department of Industrial Chemistry, Tokyo University of Science

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Other Title
  • 中低温で作動する Al/FeS<SUB>2</SUB> 型溶融塩二次電池
  • 中低温で作動するAl/FeS2型溶融塩2次電池
  • チュウ テイオン デ サドウスル Al FeS2ガタ ヨウユウエン 2ジ デン
  • Investigation of moderately low temperature Al/FeS2 secondary cells.

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Abstract

The charge-discharge characteristics of Al/FeS2 secondary cells with various ternary melts were investigated for the operating temperature of 100-450°C. The Al/FeS2 cells with 47 mol% AlCl3-38 mol% NaCl-15 mol% MCl melts (M-=--Li, K) had a larger discharge capacity and a longer cycle life (450 cycles) than those with 47 mol% AlCl3-53 mol% NaCl binary melts at 150°C. Using 50 mol% AlCl3-25 mol% NaCl-25 mol% LiCl melt as the electrolyte, good charge-discharge cycling behavior could be demonstrated at 120°C. Such improvement of the cell performance was due to a decrease in the melting point of the electrolyte. AlCl3-NaCl-1-butylpyridinium chloride (BPC) and AlCl3-LiCl-BPC melts were found to be superior to the AlCl3-BPC. melt as the electrolyte at 90-140°C. The cell with a basic A1C13NaClBPC melt (below 50 m ot% AlCl3) had a larger discharge capacity and a higher cell voltage than those with the acidic melts. The BPC concentration affected the chargedischarge performance. The cell with AlCl3-LiCl-BPC melt had a slightly tower cell voltage and a larger discharge capacity than those with the AlCl3-LiCl-BPC melt. Both the basic AlCl3-LiCl-BPC melts containing 9-17 mol% BPC and the basic AlCl3-LiCl-BPC melts containing 7-17 mol% BPC were the most promising electrolytes around 100°C.

Journal

  • NIPPON KAGAKU KAISHI

    NIPPON KAGAKU KAISHI 1988 (8), 1452-1458, 1988-08-10

    The Chemical Society of Japan

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