| GO/ZIF-67模板制备rGO/NiCo2S4及高性能不对称超级电容器 |
| Preparation of rGO/NiCo2S4 and High-Performance Asymmetric Supercapacitors Using GO/ZIF-67 Template |
| 作者 | 单位 | E-mail | | 杨安乐 | 能量转化与储存材料化学教育部重点实验室, 华中科技大学化学与化工学院, 武汉 430074 | | | 覃甜甜 | 能量转化与储存材料化学教育部重点实验室, 华中科技大学化学与化工学院, 武汉 430074 | | | 冯学磊 | 能量转化与储存材料化学教育部重点实验室, 华中科技大学化学与化工学院, 武汉 430074 | | | 王贵贤 | 能量转化与储存材料化学教育部重点实验室, 华中科技大学化学与化工学院, 武汉 430074 | | | 梁丽芸 | 能量转化与储存材料化学教育部重点实验室, 华中科技大学化学与化工学院, 武汉 430074 | liyun.liang@hust.edu.cn |
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| 摘要: 以氧化石墨烯（GO）为基底，在GO表面原位生长ZIF-67并作为模板，经硝酸镍刻蚀、碳化、水热硫化制得rGO/NiCo2S4复合材料。采用X射线衍射（XRD）、扫描电子显微镜（SEM）、X射线光电子能谱（XPS）表征复合材料的结构与形貌。随后将rGO/NiCo2S4复合材料制成正极材料，测试其电化学性能，测试结果显示：rGO/NiCo2S4-1.5 h电极材料在1 A·g-1的电流密度下，其比电容值高达1 577 F·g-1，当电流密度达到10 A·g-1时，倍率性能为86.4%，在10 A·g-1的电流密度下循环2 000次后，电容保持率为76.9%。另外，在6 mol·L-1 KOH电解液中，由AC//rGO/NiCo2S4-1.5 h组成的不对称电容器在功率密度为723 W·kg-1时，能量密度为33 Wh·kg-1；在高功率密度为7 277 W·kg-1时，能量密度仍保持为23 Wh·kg-1。 |
| 关键词: 石墨烯 ZIF-67 刻蚀 rGO/NiCo2S4 不对称超级电容器 |
| 基金项目: |
| Abstract: This study based on ZIF-67, which was grown on the surface of GO to make GO/ZIF-67 as a template. After etching by nickel nitrate, carbonizing and treating by hydrothermal with sodium sulfide, the final product of rGO/NiCo2S4 composite was obtained. X-ray diffraction (XRD), scanning electron microscope (SEM), and X-ray photoelectron spectroscopy (XPS) were used to characterize the structure and morphology of the composite which confirmed the expected product was obtained. Subsequently, the rGO/NiCo2S4 composite material was made into a positive electrode material and tested the electrochemical performance. The test results show that the rGO/NiCo2S4-1.5 h electrode material has a specific capacitance of 1 577 F·g-1 at current density of 1 A·g-1. When the current density reached 10 A·g-1, the rate performance was 86.4%. After 2 000 cycles at a current density of 10 A·g-1, the capacitance retention rate of rGO/NiCo2S4-1.5 h was 76.9%. In addition, an asymmetric capacitor of AC//rGO/NiCo2S4-1.5 h was assembled in a 6 mol·L-1 KOH electrolyte. It delivered an energy density of 33 Wh·kg-1 at a power density of 723 W·kg-1, and it remained as high as 23 Wh·kg-1 even at 7 277 W·kg-1. |
| Keywords: graphene ZIF-67 etching rGO/NiCo2S4 asymmetric supercapacitor |
| 投稿时间：2020-04-11 修订日期：2020-06-17 |
| 摘要点击次数: 2050 |
| 全文下载次数: 836 |
| 杨安乐,覃甜甜,冯学磊,王贵贤,梁丽芸.GO/ZIF-67模板制备rGO/NiCo2S4及高性能不对称超级电容器[J].无机化学学报,2020,36(10):1822-1830. |
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