Explain the basic knowledge of alkaline batteries?

Date:2021-05-10
Summary:

  Alkaline batteries are also known as alkaline dry bat […]

  Alkaline batteries are also known as alkaline dry batteries, alkaline zinc-manganese batteries, alkaline-manganese batteries, and are the best-performing varieties in the zinc-manganese battery series. Suitable for large discharge capacity and long-term use. The internal resistance of the battery is lower, so the current generated is larger than that of ordinary carbon batteries. Because this type of battery does not contain mercury, it can be disposed of with household garbage without deliberate recycling.

   Alkaline batteries are the most successful high-capacity dry batteries, and they are also one of the most cost-effective batteries. Alkaline batteries use manganese dioxide as the positive electrode, zinc as the negative electrode, and potassium hydroxide as the electrolyte. Its characteristics are better than those of carbon batteries, and the electric capacity is large. The chemical formula is: Zn+MnO2+H2O→Mn(OH)2+ZnO structure.
Alkaline batteries adopt the opposite electrode structure of ordinary batteries in structure, which increases the relative area between the positive and negative electrodes, and replaces ammonium chloride and zinc chloride solutions with high-conductivity potassium hydroxide solution. The negative electrode zinc is also The change from flakes to granules increases the reaction area of ​​the negative electrode. In addition, high-performance electrolytic manganese powder is used, so the electrical performance is greatly improved. Generally, alkaline batteries of the same type are the capacity and discharge time of ordinary batteries. 3-7 times higher than the low temperature performance. Alkaline batteries are more suitable for high-current continuous discharge and high working voltage applications, especially for cameras, flashlights, razors, electric toys, and CDs. Computer, high-power remote control, wireless mouse, keyboard, etc.