| 王俊,叶常春,苏明,张凯,蔡松亮.化学通报,2021,84(12):1356-1361. |
| 共价有机骨架衍生碳基材料的制备及其电化学性能 |
| Preparation and electrochemical properties of carbon-based materials derived from COF |
| 投稿时间：2021-02-22 修订日期：2021-05-27 |
| DOI： |
| 中文关键词: 共价有机框架材料 超级电容器 碳基材料 负极材料 |
| 英文关键词:Covalent Organic Framework Materials Supercapacitors Carbon-based materials Anode material |
| 基金项目:中山职业技术学院校级科研项目(2018KQ04)、广东省教育厅特色创新(自科)类项目(2020KTSCX331)、中山市社会公益与基础研究项目(2020B2029)和广东省科技创新战略专项资金项目(PDJH2020A1280)资助 |
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| 中文摘要: |
| 设计具有多孔结构、比表面积大的高性能电极材料对于发展高能量密度的超级电容器尤为重
要。 在此，我们以共价有机骨架材料（Covalent organic framework，COF）为前驱体,通过简单热处理构建出一种氮掺杂的多孔碳纳米材料作为超级电容器电极材料。 该材料显示出高导电性和高表面积,当这种碳材料应用于超级电容器作为负极时表现出高的面积比容量。 在电流密度为 1mA?cm - 2时,其面积比容量可达 266. 58mF?cm - 2 ;即使电流密度为 20mA?cm - 2 时,面积比容量仍保持 71. 7% ,表现出很好的倍率性能;并且,该材料循环 3000 圈后依然具有 84. 8% 的容量保持率。阻抗测试表明,这种碳材料的电等效电阻约为 0. 9Ω。 本工作提出的共价有机骨架衍生的氮掺杂的多孔碳具有优越的电化学性能,为发展高性能超级电容器提供了新的方向。 |
| 英文摘要: |
| The design of high-performance electrode materials with porous structure and high specific surface area is crucial for the development of supercapacitors with high energy density. Herein, a unique nanomaterial derived from covalent organic framework (COF) is constructed as a supercapacitor electrode material by a simple heat treatment, which shows the advantages of high conductivity and and high surface area. Electrochemical tests show that the supercapacitors with as the negative electrode shows a high area specific capacity, and the specific capacitance reaches up to 266.58 mF cm-2 at the current density of 1 mA cm-2. Even at the current density of 20 mA cm-2, the area specific capacity of C-COF still maintains 71.7%, showing good rate performance. And the material still has a capacity retention rate of 84.8% after 3000 cycles. The impedance test shows that the electrical equivalent resistance of the C-COF material is about 0.9 Ω, and the angle is close to 90 degrees. The carbon-based materials derived from the covalent organic framework proposed in this work have superior electrochemical properties, which provide a new visual for the development of high-performance supercapacitors. |
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