Nickel Gradient Electrode.
Patent Application, Filed 31 Mar 88,
DEPARTMENT OF THE AIR FORCE WASHINGTON DC
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This invention relates generally to rechargeable batteries, and, in particular, relates to batteries that use nickel electrodes. This invention provides an improved nickel electrode with a selected gradient of additive materials. The present invention controls the concentration of additives in the impregnating solution during impregnation such that an additive gradient is generated. In the situation where the highest ionic conductivity is needed at the current collector boundary with the active material, the electrochemical impregnating solution is initially high in additive, and at the end of impregnation has been adjusted to significantly lower additive concentration. For chemical impregnation the electrodes are similarly dipped in solutions that are initially high in additive. This invention is suitable for conventional additives such as cobalt, cadmium, barium, manganese, and zinc. It is therefore one object of the present invention to provide an improved nickel electrode of a battery cell with an additive in the active material to increase the life of the battery cell It is another object of the present invention to provide for an improved nickel electrode having a greater concentration of additive near the current collector of nickel. Patent Applications. aw
- Electrical and Electronic Equipment
- Electrochemical Energy Storage