Benefits of Ni-MH Rechargeable Batteries for Military Aircraft

The performance of Ni-MH batteries also depends on the cathode formulation and on the separator characteristics. Higher capacities from 700 to 1,000 Ah/kg are possible using high-performance rare earth elements. Preliminary studies performed on various rare earth materials indicate that an alloy known as VjTi composed of vanadium Vj 5 and titanium Ti2 3 4 has twice the capacity of LaNi. Material scientists believe that addition of cobalt-hydroxide [CofOHlj] to the cathode electrode produces cobalt-oxide with much higher conductivity than nickel-hydroxide (Ni-OOH). Any oxygen evolved at the positive electrode on overcharge 

Preventing occurrence of fine metal alloy particles 

Improved oxidation resistance during manufacturing process 

Base Element Price in /lb. ( /kg) Cathode Material Price in /lb. ( /kg) 

Regarding cathode material cost, precise price quotation is difficult. The price per pound or kilogram of the material depends on the purity of the material, the amount of material to be purchased, and the transaction time. On the basis of a preliminary price survey of various cathode materials. Table 1.5 summarizes the price quotations. 

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