![]() Carbon is used in the cathode because manganese dioxide is not a good conductor on its own. The manganese dioxide causes the oxidation. Binders may also be added, as well as an electrolyte solution or water, to help build the cathode. The cathode is comprised of a manganese dioxide and carbon mixture. The electrolyte is caustic, and therefore, reduces the hydrogen gassing rate. Electrolytic manganese dioxide is more pure than standard reagent manganese dioxide, and has a greater reactivity. The alkaline-manganese dioxide battery contains electrolytically manufactured manganese dioxide and aqueous alkaline electrolyte, as well as zinc metal as a powder. Today's version is 60% more powerful than the original alkaline battery that was introduced in the early 1960s. Furthermore, the use of organic inhibitors helped bulge and leakage problems, and a reduction of mercury helped make the battery even more efficient and environmentally sound. ![]() A butt-seam metal finish allowed the battery better internal volume. First, it began using a gelled and amalgamated zinc powder anode within a compartment in its center while at the same time employing vented plastic seals. Since its beginnings, the alkaline system has gone through many changes. Alkaline batteries come in two forms, either as large cylindrical cells, or as miniature cells resembling buttons. The alkaline system has many advantages over the competing Leclanche or zinc-carbon battery. Evolution of Todays Alkaline-Manganese Dioxide Battery In addition, the battery can function at temperatures up to 55 degrees Celsius. The voltage for this battery begins above 1.5 volts, which decreases gradually during discharge. This is due to higher purity and activity of the manganese dioxide, the dense cathode with little electrolyte, and the efficient spacing of components. Theoretically, alkaline-manganese dioxide cells have a higher capacity than Leclanche, or zinc-carbon cells, of similar sizes. ![]() The alkaline-manganese dioxide battery was introduced in the early 1960s and remains in a strong position in todays battery market. The battery has either a metal or plastic jacket, as well as covers on its bottom and top, to help control polarity in applications. ![]() Inside the hollow cathode are separator rings, which are positioned in layers, and inside the separator rings is the anode. The cathode of manganese dioxide and carbon is a hollow cylinder within the can, located very close to the can surface. The alkaline battery gets its name because it has an alkaline electrolyte of potassium hydroxide.Īs illustrated in Figure 1, the batterys container is a cylindrical steel can, and serves as a current collector. Molecular Expressions: Electricity and Magnetism: Alkaline Battery ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |