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    STUDIA CHEMIA - Issue no. 1-2 / 1999  
         
  Article:   EFFECT OF CURING ON THE PERFORMANCE OF LEAD-ACID BATTERY POSITIVE PLATE.

Authors:  ELEONORA MARIA RUS, DELIA MARIA CONSTANTIN.
 
       
         
  Abstract:  The performance of a lead-acid battery depends on the structure and composition of positive active mass, a mixture of -PbO2 and -PbO2. The amounts of these two crystal PbO2 modifications that are formed in the positive active mass depend on the processing plate history and on its formation conditions. The curing process is the longest step in the manufacture of lead-acid batteries. In this work the effect of three different curing methods on the physico-chemical and electrochemical properties of positive plates was studied. IR spectra, X-ray diffraction, scanning electron microscope observations and wet-chemical analysis were used as techniques of investigation. It has been observed that curing conditions (duration, humidity and temperature) strongly influence electrode phase-composition and electrical performance. A continuous recrystallization process and a growth of crystal size were observed during curing at low temperature and inadequate humidity and temperature.  
         
     
         
         
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