Al-Doped α-Nickel Hydroxide Electrode : Addition of Co and Effect of Al Ion in Electrolyte

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Author(s)

    • Choi Bokkyu CHOI Bokkyu
    • Collaborative Research Center for Energy Engineering, Institute of Industrial Science, The University of Tokyo
    • Lee Sunmook LEE Sunmook
    • Collaborative Research Center for Energy Engineering, Institute of Industrial Science, The University of Tokyo
    • OTSUJI Yuichiro
    • Collaborative Research Center for Energy Engineering, Institute of Industrial Science, The University of Tokyo
    • FUSHIMI Chihiro
    • Collaborative Research Center for Energy Engineering, Institute of Industrial Science, The University of Tokyo
    • TSUTSUMI Atsushi
    • Collaborative Research Center for Energy Engineering, Institute of Industrial Science, The University of Tokyo

Abstract

The positive electrodes of nickel metal hydride (NiMH) batteries were doped with Al to improve the discharge capacity of NiMH batteries and its effects on the electrode performance were studied. Al-doped <I>α</I>-Ni(OH)<SUB>2</SUB> electrodes were prepared by co-precipitation method. The characteristics of the positive electrode in KOH solution were investigated with charge/discharge cycles. The elution of doped Al into the electrolyte was observed as the number of charge/discharge cycles increased, which was confirmed by the ICP-AES analysis of the electrolyte after repeated charge/discharge cycles. This subsequently led to the decrease in the discharge capacity. However, it was found that the addition of Al ions into the electrolyte stabilized <I>α</I>-Ni(OH)<SUB>2</SUB> and resulted in the increased discharge capacity.

Journal

  • JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

    JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 42(4), 452-456, 2009-07-01

    The Society of Chemical Engineers, Japan

References:  23

Codes

  • NII Article ID (NAID)
    10025306521
  • NII NACSIS-CAT ID (NCID)
    AA00709658
  • Text Lang
    ENG
  • Article Type
    ART
  • ISSN
    00219592
  • NDL Article ID
    10285318
  • NDL Source Classification
    ZP1(科学技術--化学・化学工業)
  • NDL Call No.
    Z53-R395
  • Data Source
    CJP  NDL  J-STAGE 
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