摘要
三维孔状石墨烯气凝胶是一种理想的超级电容器电极材料。以氧化石墨烯为碳源,SiO2为硅源,使用一步水热法合成了高孔隙率的硅掺杂石墨烯气凝胶(Si-GA)。通过扫描电子显微镜、X射线衍射仪和傅里叶变换红外光谱等多种表征方法,完整地揭示了Si-GA的形貌、晶体结构和化学组分。采用热重分析仪对样品进行热稳定性测试。结果表明,Si-GA在浓度1mol/L的KOH电解液中表现出超高的比电容(348.5F/g,1A/g)和优异的循环稳定性,这也说明Si-GA作为高性能超级电容器电极在能源领域具有广阔的应用前景。
3 Dporous graphene aerogels have become an ideal supercapacitor electrode material.Therefore,a stable and high-performance silicon-doped graphene aerogel(Si-GA)was prepared by simple one-step hydrothermal synthesis,in which graphene oxide(GO)and silicon dioxide(SiO2)were adopted as carbon source and silicon source.The morphology,crystal structure and chemical composition of Si-GA were characterized by scanning electron microscope(SEM),X-ray diffraction(XRD)and Fourier transform infrared spectrum(FT-IR),and the thermal decomposition of the sample was performed by thermal gravimetric analyzer(TGA).The experiment demonstrated that the as-made Si-GA revealed excellent capacitive behavior(348.5 F/g at 1 A/g)and long-term cycling stability in1.0 mol/L KOH electrolyte,which indicated the good potential of Si-GA as supercapacitors electrode for highperformance energy storage devices.
作者
于琦
任帅
容萍
姜立运
李亚鹏
Yu Qi;Ren Shuai;Rong Ping;Jiang Liyun;Li Yapeng(School of Materials Science and Engineering,Institute of Graphene at Shaanxi Key Laboratory of Catalysis,Shaanxi University of Technology,Hanzhong 723001;School of Physics and Telecommunication Engineering,Shaanxi University of Technology,Hanzhong 723001)
出处
《化工新型材料》
CAS
CSCD
北大核心
2020年第10期96-100,共5页
New Chemical Materials
基金
国家自然科学基金(51502166)
陕西省教育厅专项(17JK0130)
陕西省重点研发计划一般项目-工业领域(2018GY-040)。
关键词
石墨烯
硅掺杂
水热法
电化学
超级电容器
graphene
silicon-doping
hydrothermal method
electrochemistry
supercapacitor
