| 三维多孔碳纳米管-还原氧化石墨烯复合气凝胶应用于高性能对称超级电容器 |
| Three-dimensional porous carbon nanotubes-reduced graphene oxide composite aerogel for high-performance symmetrical supercapacitor |
| 作者 | 单位 | E-mail | | 杨小龙 | 南京理工大学, 软化学与功能材料教育部重点实验室, 南京 210094 | | | 王晨淏 | 南京理工大学, 软化学与功能材料教育部重点实验室, 南京 210094 | | | 卢振杰 | 南京理工大学, 软化学与功能材料教育部重点实验室, 南京 210094 | | | 潘书刚 | 常州工学院, 常州 213032 | panshugang2010@163.com | | 付永胜 | 南京理工大学, 软化学与功能材料教育部重点实验室, 南京 210094 | fuyongsheng@njust.edu.cn | | 汪信 | 南京理工大学, 软化学与功能材料教育部重点实验室, 南京 210094 | wangx@njust.edu.cn |
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| 摘要: 以羟基化的碳纳米管(CNT-OH)和自制的氧化石墨烯(GO)为原料，通过氧化还原自组装的水热合成策略制备了碳纳米管-还原氧化石墨烯(CNTs-rGO)三维气凝胶，并探究了水热温度对三维气凝胶的影响，利用扫描电子显微镜(SEM)、X射线衍射(XRD)、拉曼光谱(Raman)和X射线光电子能谱(XPS)对材料的结构、形貌进行了表征，并对其进行电化学性能测试。其中，在140℃下合成的气凝胶CNTs-rGO展示了最佳的电化学性能，在1 A·g-1电流密度下的比电容高达294.65 F·g-1，循环伏安曲线在50 mV·s-1扫速下的形状仍然近似于矩形，展示了良好的可逆性。将其作为正极和负极材料组装的对称超级电容器在功率密度为249.8 W·kg-1时的最大能量密度为3.744 Wh·kg-1，在1 A·g-1下循环10 000次后，其电容保持率和库仑效率均约为100%。优异的电化学性能主要归因于CNTs-rGO复合材料疏松多孔的三维立体结构，这保证了离子的快速运输，同时CNTs和rGO的交联结构提高了电导率，充分发挥了CNTs和rGO的化学和电学性能。 |
| 关键词: 羟基化碳纳米管 氧化石墨烯 水热合成 三维气凝胶 超级电容器 |
| 基金项目: 国家自然科学基金(No.52173255)和江苏省高等学校基础科学(自然科学)研究项目(No.23KJA430003)资助。 |
| Abstract: Carbon nanotubes-reduced graphene oxide (CNTs-rGO) three-dimensional aerogels were prepared using hydroxylated carbon nanotubes (CNT-OH) and graphene oxide (GO) as raw materials through redox self-assembly hydrothermal synthesis strategy. The effect of hydrothermal temperature on three-dimensional aerogels was investigated. The structure and morphology of the materials were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), Raman spectroscopy (Raman) and X-ray photoelectron spectroscopy (XPS). The electrochemical test results indicate that the aerogel CNTs-rGO synthesized at 140 ℃ showed the best electrochemical performance, the specific capacitance at 1 A·g-1 current density was up to 294.65 F·g-1, and the shape of cyclic voltammetry curve at 50 mV·s-1 scanning speed was still similar to a rectangle, showing good reversibility. The assembled symmetrical supercapacitor had a maximum energy density of 3.744 Wh·kg-1 at a power density of 249.8 W·kg-1. After 10 000 cycles at 1 A·g-1, its capacitance retention and Coulombic efficiency were both about 100%. The excellent electrochemical performance is mainly attributed to the porous three -dimensional structure of CNTs -rGO composite material, which ensures rapid ion transport. Carbon nanotubes can not only overcome the sheet stacking problem of graphene, but also increase the specific surface area of the composite material, increase the reactive sites, and improve its electrochemical properties; at the same time, it can also provide electron transport channels and improve the conductivity of the material, so that the composite material has better mechanical and electrochemical properties. |
| Keywords: hydroxylated carbon nanotube graphene oxide hydrothermal synthesis three-dimensional aerogel supercapacitor |
| 投稿时间：2023-10-03 修订日期：2023-12-13 |
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| 杨小龙,王晨淏,卢振杰,潘书刚,付永胜,汪信.三维多孔碳纳米管-还原氧化石墨烯复合气凝胶应用于高性能对称超级电容器[J].无机化学学报,2024,40(1):155-163. |
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