Sanyo Electric Co., Ltd.

Masaki Higuchi

Masayuki Terasaka

Kenji Arisawa

Takuya Tamagawa

Kouzou Ohtsuki

Disclosed is a method for activating a cell employing a non-sintered type nickel positive electrode. The electrode has metallic cobalt powder and either nickel oxyhydroxide in the range of 60 wt % or less excluding 0 wt % or dischargeable higher oxidized cobalt compound powder whose cobalt has a valence of three or more in the range of 60 wt % or less excluding 0 wt %. The method comprising the steps of resting the cell until the positive electrode potential becomes substantially equal to the equilibrium potential of Co/Co(OH).sub.2, and performing initial charging of the cell, following the resting step.

Method for activating an alkaline storage cell employing a non-sintered

The present invention discloses a method for activating an alkaline storage cell comprising a non-sintered type nickel positive electrode comprised of a metallic cobalt powder. The method comprises a first step for fabricating the alkaline storage cell, a second step for charging the fabricated storage cell is charged with the charging amount of 1000 mAH or lower than the same per 1 g of the metallic cobalt powder included in the positive electrode, a third step for resting the charged storage cell, and a fourth step for applying an initial charging/discharging operation is applied to the storage cell which was rested at the third step.

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Sumoto, Japan

Masaki Higuchi