Lithium manganese battery: full name: lithium manganese dioxide battery (lithium manganese dioxide, Li MnO2). In the primary battery, metal lithium is used as the anode and manganese dioxide as the cathode. In the primary battery, the anode is the negative electrode, electrons flow from the negative electrode to the positive electrode, and current flows from the positive electrode to the negative electrode; In the electrolytic cell, the anode is connected with the positive electrode, and the anion in the solution is oxidized on the anode. Corresponding to cathode.

Working principle editing

Lithium manganese dioxide battery takes manganese dioxide treated by special process as the positive active material and metal lithium with high potential and high specific energy as the negative active material. The electrolyte adopts organic electrolyte solution with good conductivity. The battery structure has two forms: fully sealed and semi sealed. Of course, the safety and shelf life of full seal are better than that of semi seal.

The negative electrode of lithium manganese dioxide battery is metal lithium, and the positive active material is manganese dioxide. The electrolyte is the inorganic salt lithium perchlorate (LiClO4), which is dissolved in the mixed organic solvent of propylene carbonate (PC) and 1,2-dimethoxyethane (DME). Its 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 +)

Fully sealed lithium manganese battery (2 sheets)

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

Lithium, atomic number 3, ranks first in the first main group of the periodic table of elements. Among the known metals, lithium has the lightest atomic weight (6.94) and the most negative electrode potential (- 3.045v). The name of the element comes from Greek and originally means "stone". In 1817, it was discovered by Swedish scientist ALF Weicong when analyzing lithium feldspar ore. Because its potential is the most negative, the battery matched with appropriate cathode materials has superior electrical performance. Lithium manganese dioxide battery is one of the lithium series primary batteries with the lowest price and the best safety. The open circuit voltage is about 3.3V, the load voltage is 2.8V, the nominal voltage is 3.0V, and the cut-off voltage is 2.0V. The discharge voltage is relatively stable and suitable for high-power discharge.