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Alkaline Battery Cell Reactions

An alkaline battery uses zinc powder as the anode, manganese dioxide as the cathode, and potassium hydroxide as the electrolyte. The zinc reacts with hydroxide ions to form zinc oxide and release electrons, while the manganese dioxide reacts with water and hydroxide ions to consume electrons. The overall reaction produces 1.5V across the battery. Alkaline batteries are typically rated between 1.5-1.65V when new and provide 1.1-1.3V under load, with AA cells commonly rated for 700mA.

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36 views1 page

Alkaline Battery Cell Reactions

An alkaline battery uses zinc powder as the anode, manganese dioxide as the cathode, and potassium hydroxide as the electrolyte. The zinc reacts with hydroxide ions to form zinc oxide and release electrons, while the manganese dioxide reacts with water and hydroxide ions to consume electrons. The overall reaction produces 1.5V across the battery. Alkaline batteries are typically rated between 1.5-1.65V when new and provide 1.1-1.3V under load, with AA cells commonly rated for 700mA.

Uploaded by

LuisLlanos
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Reaction

In an alkaline battery cell, the powder zinc serves as anode, manganese dioxide serves
as cathode and potassium hydroxide serves as electrolyte. First half reaction is,

Second
half reaction is,

Overall reaction,

An alkaline
battery cell is rated for 1.5 V. A new non discharged alkaline cell shows a voltage of 1.50
to 1.65 V. The average voltage under load condition may be 1.1 to 1.3 V. AA alkaline cell
is generally rated for 700 mA.
There are various types of alkaline battery depending on various parameters.

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