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In this paper, the new 2D material MXene-V2C was prepared by etching V2AIC. Then, with MXeneV2C as the base material and KMnO4 as the manganese source, MnO2/MXene-V2C composites with different MnO2 content are prepared by one-step hydro-thermal method. After a series of characterization analysis of the prepared samples, the results show that MnO2/MXene-V2C has the best performance when MnO2 content is 20%. As shown from the results, when the charging and discharging current is 100mA/g, the first discharge capacity of the composite is up to 130mAh/g, which is 2.4 times as much as that of MnO2 as the cathode material alone, and it decays to 41% after 100 cycles, which is close to the first discharge specific capacity of MnO2. The adding of the MXene-V2C increases the conductivity and stability of MnO2.

Study on MnO2/MXene-V2C composite as cathode for magnesium ion battery