| 简介 |
The hydrogen occluding alloy in the negative electrode for alkali secondary cell is an AB5 base alloy containing primarily rare earth elements and nickel. Component A comprises rare earth elements, and contains lanthanum and cerium in an amount of from 99 wt% to 100 wt%, inclusive, of the total, and neodymium and praseodymium in an amount of from 0 wt% to 1 wt%, inclusive, of the total. The total amount of lanthanum, cerium, neodymium, and praseodymium is 100 wt% or less. Component B contains nickel and cobalt. Where X denotes the AB ratio, which is the atomic ratio of component B to component A, and Y (wt%) denotes the value of the added amount of an yttrium compound with repsect to 100 wt% of the hydrogen occluding alloy, X is from 5.00 to 5.80, inclusive, and the product of X and Y is from 1.0 to 5.0, inclusive. |
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