Rechargeable electrochemical cell with a negative electrode...

Details Rechargeable electrochemical cell with a negative electrode... Rechargeable electrochemical cell with a negative electrode...

H - Electricity

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319/83

H01M 4/38 (2006.01) B01J 23/83 (2006.01) B01J 23/84 (2006.01) B01J 23/889 (2006.01) H01M 4/00 (2006.01) H01M 4/24 (2006.01) H01M 4/62 (2006.01)

Patent

CA 1279095

ABSTRACT A rechargeable electrochemical cell a positive electrode, an alkaline electrolyte and a negative electrode made mainly of a hydrogen absorbing alloy containing a mixture of at least two rare earth elements including Ce whose content relative to the total amount of rare earth elements is less than 40wt% and is preferably 0.1wt% to 12wt% or in the range 0.1-8wt%, which gives still better capacity and life characteristics. Moreover, larger capacity characteristics can be obtained if the negative electrode contains a conductive powder preferably with an average particle diameter of 10µm or less as a subsidiary material.

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