Alkaline battery

Abstract

An alkaline battery of this invention includes: a negative electrode including a negative electrode mixture that contains a zinc alloy as an active material, the zinc alloy containing at least aluminum; an alkaline electrolyte; and a positive electrode. The alkaline electrolyte includes an aqueous KOH solution and LiOH and an aluminum compound that are dissolved in the aqueous KOH solution. The alkaline battery has excellent high-rate discharge characteristics.

1 . An alkaline battery comprising:
 a negative electrode including a negative electrode mixture that contains a zinc alloy as an active material, said zinc alloy containing at least aluminum;   an alkaline electrolyte; and   a positive electrode,   wherein said alkaline electrolyte comprises an aqueous KOH solution and LiOH and an aluminum compound that are dissolved in said aqueous KOH solution.   
     
     
         2 . The alkaline battery in accordance with  claim 1 , wherein the amounts of the LiOH and the aluminum compound contained in the electrolyte in said negative electrode mixture are 0.1 to 2 wt % and 0.001 to 0.2 wt % of the negative electrode mixture, respectively. 
     
     
         3 . The alkaline battery in accordance with  claim 1 , wherein the amounts of the LiOH and the aluminum compound contained in the electrolyte in said negative electrode mixture are 0.15 to 3 parts by weight and 0.0015 to 0.3 parts by weight per 100 parts by weight of said zinc alloy. 
     
     
         4 . The alkaline battery in accordance with  claim 1  or  2 , wherein the weight ratio of the whole alkaline electrolyte to the zinc alloy of the negative electrode is 0.1 to 2.