How lithium-manganese batteries work

- Sep 30, 2018-

Lithium-manganese dioxide battery uses manganese dioxide as a positive electrode active material treated by a special process, and lithium metal with high potential and high specific energy is used as a negative electrode active material. The electrolyte is made of an organic electrolyte solution with good conductivity, and the battery structure is complete. Sealed and semi-sealed two forms. Of course, the safety and shelf life of the full seal is better than that of the semi-sealed one.

The lithium-manganese dioxide battery negative electrode is metallic lithium, and the positive electrode active material is manganese dioxide. The electrolyte is an inorganic salt lithium perchlorate (LiClO4) dissolved in a mixed organic solvent of propylene carbonate (PC) and 1,2-dimethoxyethane (DME). The chemical expression is: (-) Li / LiClO4—PC+DME / MnO2 (+) Battery Negative Reaction: Li → Li+ + e Positive Reaction: MnO2 + Li+ + e→MnO2(Li+) Total Reaction: Li + MnO2 → MnO2(Li+).

The reaction mechanism of the lithium-manganese dioxide battery is different from that of a general battery. In the non-aqueous organic solvent, lithium ions dissolved by the negative electrode lithium migrate into the crystal lattice of MnO2 through the electrolyte to form MnO2 (Li+). Mn is reduced from +4 to +3, and its crystal structure does not change.

The lithium-manganese dioxide battery is the lowest-priced and safest battery of the lithium series primary battery. The open circuit voltage is about 3. 3V, the load voltage is 2. 8V, the nominal voltage is 3.0V, the cutoff voltage is 2.0V, and the discharge voltage is relatively stable, suitable for high power discharge.