Ni(OH)_2/石墨相氮化碳/石墨烯复合材料的制备及电化学性能
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摘要
通过微波法制备氢氧化镍Ni(OH)_2、石墨相氮化碳(g-C_3N_4)、石墨烯(RGO)复合材料,研究了不同配比组合对复合材料结构、形貌和电化学性能的影响.通过X射线衍射(XRD)、扫描电子显微镜(SEM)及傅里叶红外光谱(FT-IR)表征材料的表面微观结构和还原程度.采用循环伏安(CV)、恒流充放电(GCD)及电化学阻抗(EIS)测试电极材料的电化学性能.结果表明:由Ni(OH)_2,g-C_3N_4,RGO制备的三元复合材料为三维片层空间互相交错结构,当电流密度为1 A/g时,电极材料的比电容为741. 9 F/g,显示出良好的电化学性能.
Ni(OH)_2,graphite phase carbonitride(g-C_3N_4) and graphene(RGO) composites were prepared by microwave method.The effects of different ratios on the structure,morphology and electrochemical properties of the composites were investigated. X-ray diffraction(XRD),scanning electron microscopy(SEM),and Fourier transform infrared spectroscopy(FT-IR) were used to characterize the surface microstructure and the degree of reduction of the material. The electrochemical properties of electrode materials were tested using cyclic voltammetry(CV),constant current charge and discharge(GCD) and electrochemical impedance(EIS). The results show that the ternary composites prepared by Ni(OH)_2,g-C_3N_4 and RGO are three-dimensional interlaminar interlaced structures. When the current density is 1 A/g,the specific capacitance of the electrode materials is 741. 9 F/g,showing good electrochemical performance.
Ni(OH)_2,graphite phase carbonitride(g-C_3N_4) and graphene(RGO) composites were prepared by microwave method.The effects of different ratios on the structure,morphology and electrochemical properties of the composites were investigated. X-ray diffraction(XRD),scanning electron microscopy(SEM),and Fourier transform infrared spectroscopy(FT-IR) were used to characterize the surface microstructure and the degree of reduction of the material. The electrochemical properties of electrode materials were tested using cyclic voltammetry(CV),constant current charge and discharge(GCD) and electrochemical impedance(EIS). The results show that the ternary composites prepared by Ni(OH)_2,g-C_3N_4 and RGO are three-dimensional interlaminar interlaced structures. When the current density is 1 A/g,the specific capacitance of the electrode materials is 741. 9 F/g,showing good electrochemical performance.
引文
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[2]张利华.石墨烯的制备表征及电化学性能研究[D].天津:天津大学,2012.
[3]吴洪棚.石墨烯的制备及在超级电容器中的应用[D].北京:北京交通大学,2012.
[4]汪建德,彭同江,孙红娟,等.水热反应温度对3维还原氧化石墨烯的形貌、结构和超级电容性能的影响[J].物理化学学报,2014,30(11):2077-2084.
[5]郭雅敏.基于石墨相氮化碳/石墨烯复合材料的制备、表征及其性能研究[D].郑州:郑州大学,2017.
[6]张淑博.石墨烯和石墨烯/氢氧化镍复合材料的制备及电容性能[D].沈阳:东北大学,2014.
[7] Hhummersjr W S,Offeman R E. Preparation of graphitic oxide[J]. Journal of the American Chemical Society,1958,80(6):1339-1440.
[8] Sheng K X,Xu Y X,Li C,et al. High-performance selfassembled graphene hydrogels prepared by chemical reduction of graphene oxide[J]. New Carbon Mater,2011,26(1):9-15.
[9]丁海洋,景晓燕,张密林.纳米Ni(OH)2的制备与研究[J].应用科技,2004,31(3):60-62.
[10]贾进,杨晓阳,闫艳,等.碳化物衍生碳的制备及其在气体存储与超级电容器领域的应用研究进展[J].化工进展,2014,33(10):2681-2686.
[11]赵珊珊.基于g-C3N4或RGO的催化材料的制备及性能研究[D].大连:大连理工大学,2013.
[12] Shi L,Zhang J,Liu H,et al. Flower-like Ni(OH)2,hybridized g-C3N4for high-performance supercapacitor electrode material[J]. Materials Letters,2015,145:150-153.