{HEAD ~ A positive active material} for nickel electrodes of alkaline storage batteries consists of {TAIL ~ particles} of hydroxide containing mainly nickel and covered with a layer of a hydroxide phase based on nickel and yttrium 
{ HEAD ~ A positive active material } for nickel electrodes of alkaline storage batteries consists of { TAIL ~ particles } of hydroxide containing mainly nickel and covered with a layer of a hydroxide phase based on nickel and yttrium
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