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金属有机框架材料(Metal organic frameworks,MOFs)由于具有超高的比表面积和可调的孔结构,已成为超级电容器电极材料的研究热点。以硝酸锌(Zn(NO_3)_2·6H_2O)和对苯二甲酸(C_6H_4(COOH)_2,BDC)为原料,采用水热法制备了MOF-5材料,并将MOF-5与不同比例的Ni~(2+)复合制备了Ni-MOF-5复合材料。用扫描电镜(SEM)和X射线衍射分析仪(XRD)对材料的表面形貌和结构进行了表征,采用Princeton和Arbin超级电容器测试系统对材料的电化学性能进行了测试。结果表明:复合不同比例的Ni~(2+)可获得不同形貌的Ni-MOF-5复合材料,当Ni~(2+)∶Zn~(2+)=0.50∶1.00(物质的量比)时,制得形貌均匀的微球富Ni颗粒,且其电化学性能优良,在电流密度为0.05 A/g的条件下,比容量达到400 F/g。
Metal organic frameworks (MOFs) have become the research hotspot of supercapacitor electrode materials due to their high specific surface area and tunable pore structure. MOF-5 was prepared by hydrothermal method using zinc nitrate (Zn (NO_3) _2 · 6H_2O) and terephthalic acid (C_6H_4 (COOH) _2, BDC) as raw materials. MOF-5 and different proportions of Ni ~ (2+) composite prepared Ni-MOF-5 composite material. The surface morphology and structure of the material were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The electrochemical properties of the materials were tested by using the Princeton and Arbin supercapacitor test system. The results show that Ni 2+ with different proportions can obtain Ni-MOF-5 composites with different morphologies. When Ni 2+: Zn 2+ = 0.50:1.00 ), The microspheres with uniform morphology were enriched with Ni particles and had excellent electrochemical performance. The specific capacitance reached 400 F / g at a current density of 0.05 A / g.