不同方法制备的ZnMn2O4/RGO复合材料电化学性能对比分析
Comparative analysis of electrochemical properties of ZnMn2O4/RGO composites prepared by different methods
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摘要: 以乙酸锰、乙酸锌和自制氧化石墨烯为原料，分别采用溶剂热法和水热法制备了ZnMn2O4/RGO复合材料，并对其电化学性能进行对比分析.结果表明：RGO的加入，增大了ZnMn2O4/RGO复合材料的比表面积，改善了ZnMn2O4材料的电化学性能；在电流密度为2 A/g的条件下，采用溶剂热法和水热法所制ZnMn2O4/RGO复合材料的比电容分别为763.4 F/g和127.8 F/g，经500次循环实验后，这两种方法所制备的复合材料的电容保持率分别为84.9%和83.0%，综合考虑，溶剂热法所制ZnMn2O4/RGO复合材料的综合性能较好.
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关键词:
- ZnMn2O4/RGO复合材料 /
- 溶剂热法 /
- 水热法 /
- 石墨烯 /
- 超级电容器
Abstract: Using manganese acetate, zinc acetate and self-made graphene oxide as raw materials, ZnMn2O4/RGO composites were prepared by solvothermal method and hydrothermal method, respectively, and their electrochemical properties were studied comparatively. The results showed that the addition of RGO increased the specific surface area of the ZnMn2O4/RGO composites and improved the electrochemical properties of the ZnMn2O4 material; under the condition of a current density of 2 A/g, the ZnMn2O4/RGO composites prepared by solvothermal method and hydrothermal method had specific capacitances of 763.4 F/g and 127.8 F/g, respectively. After 500 cycles of experiments, the capacitance retention rates of the composites made by these two methods were 84.9% and 83.0%, respectively. The ZnMn2O4/RGO composites made by thermal method had better comprehensive properties.-
Key words:
- ZnMn2O4/RGO composites /
- solvothermal method /
- hydrothermal method /
- graphene /
- supercapacitor
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