Eletrodos positivos tubulares para baterias chumbo ácidas produzidas com material ativo nanométrico

Abstract

Recebido em 13/5/10; aceito em 16/7/10; publicado na web em 16/11/10 LEAD ACID BATTERIES TUBULAR POSITIVE ELECTRODES ASSEMBLED WITH NANOMETRIC ACTIVE MATERIAL. Conventional stationary lead acid batteries positive tubular plates have a specific capacity of about 120 Ah/kg. This value represents an active material utilization coefficient of 50%. The production of these plates includes some initial processes to generate the active PbO 2 from a precursor material. In the present work it will be presented a proper and novel methodology to assemble tubular plates directely with nanometric powder of PbO 2 particles. The utilization coefficient of these plates was about 80%, and they were able to endure more than 130 severe duty cycles. This high utilization coefficient is a higly desirable feature for electric vehicles batteries.