Principle of lithium-manganese dioxide battery

- Nov 02, 2018 -

Lithium manganese dioxide battery is a typical organic electrolyte lithium battery. The battery was invented and developed by Sanyo Electric Co., Ltd. in Japan in 1975, and was immediately introduced to the market. The internal electrode structure of the battery can be designed and fabricated into carbon. Package, coiled, laminated, battery shape can be designed and made into a coin shape, cylindrical and square to meet the requirements of different sizes and current electrical appliances. Compared with other lithium batteries, the materials and manufacturing costs are relatively low and the safety is very good. Therefore, it is also the most widely used commercial lithium battery in the world today.

The lithium manganese dioxide battery uses lithium metal as the negative electrode, the electrolytic manganese dioxide which is appropriately heat-treated is the positive electrode, and the lithium perchlorate (or lithium trifluoromethanesulfonate) is dissolved in the mixture of propylene carbonate/ethylene glycol dimethyl ether. An electrolyte composed of a solvent. The discharge mechanism is different from the redox mechanism of general batteries. The positive reaction is a typical embedded reaction. When the battery is discharged, the lithium negative electrode undergoes an oxidation reaction, and lithium ions are dissolved in the electrolyte solution, and migrate to the manganese dioxide positive electrode, which is embedded in the manganese dioxide crystal lattice, and promotes the reduction of manganese in the manganese dioxide from tetravalent to trivalent.