During charge the positive is an anode, the negative is a cathode.During discharge the positive is a cathode, the negative is an anode.On the other hand, the role of each electrode is switched during the discharge/charge cycle. 1).įigure 3: Discharge/charge of a secondary battery represented as an electrochemical cell, with electrons and current direction.ĭuring normal use of a rechargeable battery, the potential of the positive electrode, in both discharge and recharge, remains greater than the potential of the negative electrode. The electrochemical reaction that takes place at the negative of the zinc electrode of a Nickel-Zinc battery during discharge : ![]()
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