Zinc manganese Dry cell.solar power battery storage

　　Zinc manganese battery, also known as Leclanche battery, is a battery invented by French scientist Leclanche in 1868, which uses zinc (Zn) as the negative electrode, Manganese dioxide (MnO2) as the positive electrode, neutral ammonium chloride (NH4Cl), zinc oxide (ZnCl2) aqueous solution as the electrolyte solution, and starch or paste paper as the isolation layer, Because its electrolyte solution is usually made into gel shape or adsorbed on other carriers and presents a non flowing state, it is also called zinc manganese Dry cell. According to the use of isolation layers, there are two types of batteries: paste type and plate type. Plate type batteries are also divided into two types: ammonium type and zinc type cardboard batteries according to different electrolyte solutions.

　　The Dry cell uses a zinc cylindrical shell as the negative electrode, and a graphite rod with a copper cap on the central top cover as the positive electrode. From inside to outside around the graphite rod, A: Manganese dioxide powder (black) ----- used to absorb the hydrogen generated on the positive electrode (to prevent polarization); B: Starch paste saturated with ammonium chloride and Zinc chloride was used as electrolyte solution.

　　The electrode reaction formula is: negative electrode (zinc cylinder): Zn-2e==Zn2+

　　Positive electrode (graphite): 2NH4++2e==2NH3 ↑+H2 ↑

　　H2+2MnO2==Mn2O3+H2O

　　Total reaction: Zn+2NH4++2MnO2==Zn2++2NH3+Mn2O3+H2O

　　The voltage of Dry cell is about 1.5V, which cannot be charged and regenerated.

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