Inclusion of an electronic conducting polymer additive powder in a gelled anode of an alkaline electrochemical cell having an anode active metal material can improve discharge performance of the cell. The ultrasonic horn is connectable to a transducer, and a crystallization tube is adjacent to the ultrasonic horn. The polyester resin is produced directly by a polyoon-densation reaction, after which it is cross-linked to a polymer of high molecular weight The polyester can be co-polymerised with a co-monomer increasing flexibility, or be blended with a reactive macromonomer, which adds elasticity and crosslinking density. 5, and has a remainder formed of an impurity.