MnO2作为锂离子电池负极材料在放电过程中的相变研究

Manganese dioxide (MnO2) is an electrode anode material with high specific capacity, which is one of the most promising anode materials for next-generation lithium-ion batteries. However, the voltage platform in the discharge process is not enough to match the existing cathode materials, which restricts the application and commercialization of manganese dioxide. In this paper, starting from the different discharge stages of the battery, XRD, TEM and discharge test are used to study the phased phase transition of manganese dioxide in the discharge process of manganese dioxide, and summarize the phase transformation of manganese dioxide as an anode material for lithium-ion batteries in the discharge capacity of 100-600mAh, especially the 300-400mAh discharge interval is studied, and the relationship between the crystal change and the manganese dioxide voltage platform in the process of phase transformation is revealed, which provides a theoretical basis for the optimization of manganese dioxide anode materials.