Physical and electrochemical characteristics of nickel hydroxide as a positive material for rechargeable alkaline batteries

  • Watanabe K
  • Kikuoka T
  • Kumagai N
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Abstract

Nickel hydroxide is widely used as an active material in pasted-type nickel electrodes. Physical properties of several nickel hydroxide powders have been examined by laser diffraction, BET, X-ray diffraction, thermal analysis and SEM. Nickel hydroxide powder with a smaller crystalline size shows better charge-discharge cyclic characteristics. The chemical diffusion coefficients of the proton in the nickel hydroxide sample are measured by a current pulse relaxation method. Nickel hydroxide with a smaller crystalline size shows a higher proton diffusion coefficient, giving excellent cycling behaviour.

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Authors

  • K. Watanabe

  • T. Kikuoka

  • N. Kumagai

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