Alkaline batteries
Definition
Alkaline batteries are a type of primary battery dependent on the reaction between zinc and manganese dioxide. They are known for their long shelf life and stable voltage output.
5 Must Know Facts For Your Next Test
- Alkaline batteries use potassium hydroxide as the electrolyte.
- The anode in an alkaline battery is typically made of zinc powder.
- The cathode material in an alkaline battery is usually manganese dioxide ($MnO_2$).
- Alkaline batteries have a nominal voltage of 1.5 volts per cell.
- They provide more energy density compared to traditional zinc-carbon batteries.
Review Questions
- What materials are used for the anode and cathode in an alkaline battery?
- What is the role of potassium hydroxide in an alkaline battery?
- How does the energy density of alkaline batteries compare to that of zinc-carbon batteries?
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Related terms
Electrolyte: A substance that produces an electrically conducting solution when dissolved in water, facilitating ion movement.
$MnO_2$: $MnO_2$ stands for manganese dioxide, which acts as the cathode material in many types of batteries.
Voltage: The electric potential difference between two points, measured in volts (V).
