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金属有机骨架衍生NiCo2O4/rGO复合材料的制备及其超级电容性能
          
Preparation and Supercapacitive Performance of Metal-Organic Framework Derived NiCo2O4/rGO Composites

摘    要
采用溶剂热法,按照镍和钴金属盐与氧化石墨稀(GO)质量比分别为1:0.05,1:0.07,1:0.09的配比制备镍钴金属有机骨架(Ni-Co-MOF)/GO前驱体,并将其超声喷涂在加热的泡沫镍基底上制备NiCo2O4/rGO (还原氧化石墨烯)复合电极材料,研究了该复合材料的微观结构和电化学性能。结果表明:NiCo2O4/rGO复合材料由褶皱石墨烯及其表面均匀分布的NiCo2O4纳米颗粒构成;在2 A·g-1电流密度下,盐与GO质量比为1:0.07时复合材料的比电容高达991 F·g-1,在20 A·g-1电流密度下充放电30 000次后,初始电容保持率仍高达126%。组装而成的NiCo2O4/rGO//AC非对称超级电容器的能量密度可达到41 W·h·kg-1,对应的功率密度为1 604 W·kg-1,在20 A·g-1的电流密度下经过25 000次充电/放电循环后仍可实现100%以上的电容保持率,表现出超长的循环寿命。
标    签 NiCo2O4/rGO复合材料   复合电极材料   超声喷涂   超级电容性能   NiCo2O4/rGO composite   composite electrode material   ultrasonic spray   supercapacitive performance  
 
Abstract
Nickel-cobalt metal-organic framework(Ni-Co-MOF)/graphene oxide(GO) precursors were prepared by solvothermal synthesis with mass ratios of nickel and cobalt metal salts to GO of 1:0.05, 1:0.07, and 1:0.09, respectively, and then were ultrasonically sprayed on the heated nickel foam substrate to obtain NiCo2O4/reduced graphene oxide(rGO) composite electrode materials. The microstructure and electrochemical properties of the composites were studied. The results show that the NiCo2O4/rGO composite was composed of wrinkled graphene and NiCo2O4 nanoparticles uniformly distributed on graphene surface. When the mass ratio of salt to GO was 1:0.07, the composite had a high specific capacitance of 991 F·g-1 at a current density of 2 A·g-1; after 30 000 cycles of charge and discharge at a current density of 20 A·g-1, the initial capacitance retention was still as high as 126%. The assembled NiCo2O4/rGO//AC asymmetric supercapacitor had an energy density of 41 W·h·kg-1 at a power density of 1 604 W·kg-1, and achieved capacitance retention greater than 100% after 25 000 charge/discharge cycles, showing an ultra-long cycle life.

中图分类号 TM242   DOI 10.11973/jxgccl202207008

 
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所属栏目 新材料 新工艺

基金项目 上海市自然科学基金资助项目(21ZR1445700)

收稿日期 2021/4/6

修改稿日期 2022/5/5

网络出版日期

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备注石中婷(1996-),女,江苏南通人,硕士研究生通信作者(导师):赵斌教授

引用该论文: SHI Zhongting,MIAO Tianyu,ZHAO Bin. Preparation and Supercapacitive Performance of Metal-Organic Framework Derived NiCo2O4/rGO Composites[J]. Materials for mechancial engineering, 2022, 46(7): 38~46
石中婷,缪天宇,赵斌. 金属有机骨架衍生NiCo2O4/rGO复合材料的制备及其超级电容性能[J]. 机械工程材料, 2022, 46(7): 38~46


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