High Power Density Lead Acid Cell Operating at 70 °C

Abstract

<jats:title>Abstract</jats:title><jats:p> The results presented show the feasibility of a high power density lead acid cell with tubular negatives and positives, operating at 70 °C. Although lead negatives are supposed to deteriorate fast at temperatures above 50 °C, tubular negatives at 70 °C exceed the cycle life of pasted negatives operating at conventional conditions. The high rate discharge capacity of negatives and positives is increasing considerably with temperature. It is concluded that the “temperature gain” of the negative electrode is due to increased mobility of soluble Pb<jats:sup>2+</jats:sup> species through the passivating PbSO<jats:sub>4</jats:sub> layer and to improved diffusion of H<jats:sub>2</jats:sub>SO<jats:sub>4</jats:sub> in the pore structure.</jats:p>