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The advantages of lithium manganese oxide are good rate performance, easy preparation, and low cost. The disadvantage is that the dissolution of manganese leads to poor high-temperature performance and cycling performance. By doping aluminum and sintering granulation, the high-temperature performance and cycling performance have been greatly improved, which can basically meet practical use. Overall, lithium manganese oxide batteries have low cost, strong stability, low temperature resistance, poor high-temperature performance, and slightly faster decay.
There are three types of lithium manganese oxide:
(1) Layered lithium manganese oxide LiMnO2, with a theoretical capacity of 285mA-h/g and a voltage platform of 4V. Layered structures are difficult to synthesize, unstable, and easily generate Li2Mn204 spinel structures, resulting in a decrease in voltage plateau, poor stability, and irreversible capacity decay.
(2) High voltage spinel lithium manganese oxide LiMn204, theoretical capacity 148mA-h/g, voltage platform 4.15. Poor high-temperature performance, severe capacity degradation above 55 ℃. It is also prone to generate Li2Mn204 spinel structure, resulting in a decrease in voltage plateau, poor stability, and irreversible capacity decay. Manganese carp are currently used in industry.
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