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Home >> Volvo >> 2003 >> V70 Base, 2.4 58 >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Alarm System, Control Modules, Engine Management Systems - Design And Function >> Battery (All) >> Terminology >> Active material
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Active material

The active material consists of lead oxide in the positive plates and porous lead in the negative plates. The active materials react with the sulphuric acid in the electrolyte during charging and discharging according to the following chemical reaction:

PbO2 + Pb + 2 H2 SO4 = 2 PbSO4 + 2 H2 O