Aqueous electrolyte solution containing an ethoxylated rosin amine for use in a rechargeable electric battery

Abstract

Abstract An electric battery having an azodicarbonamide compound as the depolarizer in which the electrolyte consists essentially of an aqueous solution of zinc chloride, ammonium chloride and an ethoxylated rosin amine. It is preferred that the aqueous electrolyte solution have a pH ranging from about 2.5 to about 5. The aqueous electrolyte solution may contain from about 5 to about 50% by weight of zinc chloride, up to about 25% by weight of ammonium chloride and from about 0.1 to about 5% by weight of an ethoxylated rosin amine with the balance of the solution being water. The ethoxylated rosin amine has the following general formual WHEREIN R is a radical selected from abietyl, dihydroabietyl, tetrahydroabietyl or dehydroabietyl corresponding with the organic radical of the rosin amine from which it was produced. X and y may range from 0 to 20 with the sum of x and y being at least 1 but not exceeding about 20. The improved electrolyte of this invention reduces the gassing rate of the zinc anode in said electrolyte, it improves the redeposition of the zinc active material during the recharging of the battery, and it provides a battery having a substantially improved cycle life.

Inventors

• 👤 J Paulson

Bibliographic Details