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The lead accumulator

Functioning as a battery (Discharge)

Left electrode: Lead covered with lead(IV) oxide Right electrode: Lead Vessel: Concentrated sulfuric acid

I:   Direction of the spontaneous current !

e-:    electrons At the anode: oxidation ( greek: ανα = upwards)

e-:    electrons At the cathode: reduction ( greek: κατα = downwards)

Functioning as an electrolysis (Charge)

Right electrode: Lead Left electrode: Lead Vessel: Concentrated sulfuric acid

I:   Direction of the generator induced current ! At the electrode connected to the negative pole of the generator: reduction

e-:    électrons At the electrode connected to the positive pole of the generator: oxidation

Sign of the electrodes