Why is manganese dioxide used in dry cells?

Yet both the prehistoric artists who used manganese dioxide to give lasting brown-black pigments and the users of TV remotes or torches powered by dry cells have found that this simple inorganic substance plays a valuable role in illuminating their lives. Meera Senthilingam. read more

Manganese has many valence states from 0 to +7 Manganese Dioxide is Manganese plus 4. you might say half range. It can be oxidized or reduced. read more

In an alkaline battery, the negative electrode is zinc (anode) and the positive electrode manganese dioxide (cathode). The alkaline electrolyte of potassium hydroxide is not part of the reaction, only the zinc and manganese dioxide are consumed during discharge. read more

Electrolytic manganese dioxide. Electrolytic manganese dioxide (EMD) is used in zinc–carbon batteries together with zinc chloride and ammonium chloride. EMD is commonly used in zinc manganese dioxide rechargeable alkaline (Zn RAM) cells also. For these applications, purity is extremely important. read more

Manganese has many valence states from 0 to +7 Manganese Dioxide is Manganese plus 4. you might say half range. It can be oxidized or reduced. This page may be out of date. read more

The principal use for MnO 2 is for dry-cell batteries, such as the alkaline battery and the zinc-carbon battery.[2] MnO 2 is also used as a pigment and as a precursor to other manganese compounds, such as KMnO 4. It is used as a reagent in organic synthesis, for example, for the oxidation of allylic alcohols. read more