摘要
为充分利用导电聚吡咯独特的掺杂结构与石墨烯气凝胶丰富的多孔结构,研究了氧化还原活性剂对聚吡咯/石墨烯气凝胶的结构及电化学性能的影响,并制备性能优异的电极复合材料。以对苯醌作为氧化还原活性剂,使用一步水热法制备聚吡咯/石墨烯水凝胶,冷冻干燥后制备得到氧化还原活性复合气凝胶。扫描电子显微镜结果表明,引入对苯醌后有利于获得有序的三维网络结构。傅里叶变换红外光谱、X射线衍射测试结果表明,复合材料中吡咯被成功聚合的同时氧化石墨烯被还原为石墨烯。电化学测试结果表明,对苯醌浓度为5 mmol/L时,复合气凝胶可获得最佳电化学性能,比电容可达304.0 F/g,循环10000次后可保持初始比电容的79.88%。将其与活性炭组装成非对称超级电容器,可获得高的能量密度(41.56 Wh/kg)与功率密度(400 W/kg)。
In order to make full use of the unique doped structure of conductive polypyrrole and the rich porous structure of graphene aerogel,the influence of redox activators on the structure and electrochemical performance of polypyrrole/graphene aerogel was studied,and electrodes composite materials with excellent performance were prepared.P-benzoquinone was used as the redox active agent to prepare polypyrrole/graphene hydrogel by one-step hydrothermal method,and then redox active composite aerogel after freeze-drying was prepared.Scanning electron microscope analysis shows that an ordered three-dimensional network structure can be obtained after the introduction of p-benzoquinone.Fourier transform infrared spectral and X-ray diffraction tests results show that pyrroles in the composite material are successfully polymerized,while graphene oxide is reduced to graphene.The electrochemical test results demonstrate that the best electrochemical performance can be obtained when the concentration of p-benzoquinone reaches 5 mmol/L.A specific capacitance of 304.0 F/g can be obtained at a current density of 1 A/g,79.88%of the initial specific capacitance can be maintained after 10000 charging-discharging cycles.The asymmetric supercapacitor device assembled by the composite aerogel and active carbon can provide a high energy density and power density of 41.56 Wh/kg and 400 W/kg respectively.
作者
宋慧敏
王召莹
王全璐
李文青
韩永芹
Song Huimin;Wang Zhaoying;Wang Quanlu;Li Wenqing;Han Yongqin(School of Materials Science and Engineering,Shandong University of Science and Technology,Qingdao 266590,China)
出处
《工程塑料应用》
CAS
CSCD
北大核心
2022年第2期21-26,共6页
Engineering Plastics Application
基金
国家自然科学基金面上项目(52173258)。
