batteries

Manganese Oxide — Reduction

Manganese oxide (MnO₂) is often used in chemistry as an oxidizer but also, for example, as a cathode material in batteries.

The STA measurement shows mass steps at approx. 600°C and 950°C which are due to the reduction of MnO₂ into Mn₂O₃ and finally into Mn₃O₄. The values of 9.20% and 3.07% match exactly with the stoichiometrical values thus reflecting the high accuracy of the balance system. EndothermicA sample transition or a reaction is endothermic if heat is needed for the conversion.Endothermic DSC peaks with enthalpies of 432 J/g and 180 J/g were detected during the reduction steps. The EndothermicA sample transition or a reaction is endothermic if heat is needed for the conversion.endothermic DSC peak at 1200°C is due to a reversible structural transformation, which is observed at 1148°C upon cooling also as ExothermicA sample transition or a reaction is exothermic if heat is generated.exothermal peak (dashed lines). (measurement with STA 449 F1 Jupiter^®®)