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基于高锰酸钾的自分解反应,采用水热法制备了氧化锰材料。研究了温度对产物晶相和形貌的影响。应用XRD、SEM和TEM技术对所得材料的结构和形貌进行了表征,结果表明,140℃所得材料为片状,160℃和180℃所得材料均为层状结构的花球。电化学测试结果表明,180℃所得材料具有良好的电化学性能。在50mA/g的电流密度下,首次充电比容量为849mAh/g。循环50圈后,容量保持率为79%。此外,制备材料具有优异的倍率性能。
Based on the self-decomposition reaction of potassium permanganate, a manganese oxide material was prepared by hydrothermal method. The effect of temperature on the crystalline and morphology of the product was investigated. The structure and morphology of the obtained material were characterized by XRD, SEM and TEM. The results showed that the material obtained at 140 ℃ was flaky, and the materials obtained at 160 ℃ and 180 ℃ all had the lamellar structure. Electrochemical test results show that the material obtained at 180 ℃ has good electrochemical performance. At a current density of 50 mA / g, the first charge specific capacity was 849 mAh / g. After 50 cycles, the capacity retention was 79%. In addition, the preparation material has excellent rate performance.