摘要
以Li2CO3、NH4VO3和MnO2为原料,采用高温固相法制备了钒锰氧化物的复合材料。实验中分别考察了煅烧时间和不同的V/Mn(质量比)对该种材料电化学性能的影响。结果表明,V/Mn比为1∶4,在600℃下煅烧18 h所制得的钒锰氧化物的电化学性能最好。0.1 C倍率下,首次放电比容量为142.4 mAh/g。
Vanadium manganese oxide composite material was synthesized by high temperature solid state method using Li2CO3, NH4VO3and MnO2as raw materials. The effect of calcination time and different V/Mn mass ratios on the electrochemical performance of the material was investigated. The results show that the vanadium manganese oxide whose calcination time is 18 h at 600 ℃ and V/Mn ratio is 1∶4 has the best electrochemical performance. The initial discharge specific capacity is up to 142.4 mAh/g at 0.1 C.
引文
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