超级电容器
碳纳米管
材料科学
气凝胶
石墨烯
循环伏安法
介电谱
聚乙烯醇
化学工程
甲醇
电化学
直接甲醇燃料电池
比表面积
电极
纳米技术
催化作用
复合材料
化学
有机化学
工程类
物理化学
阳极
作者
Yang Zhou,Xian-Chao Hu,Shengda Guo,Changlin Yu,Shengwen Zhong,Xianbin Liu
标识
DOI:10.1016/j.electacta.2018.01.009
摘要
Three-dimensional graphene/carbon nanotube (GR-CNTs) aerogels was fabricated by the freeze-drying process, in which polyvinyl alcohol (PVA) was empolyed as an organic binder. The electrochemical energy storage properties of aerogels were investigated using cyclic voltammetry, galvanostatic charge/discharge and electrochemical impedance spectroscopy tests, which indicated that GR-CNTs aerogels electrode possessed high specific capacitances of 375 F/g in 6 M KOH solution with a capacity retention of about 88% and 94.8% after 5000 cycles, respectively. Moreover, The GR-CNTs aerogels was also identified to be a support matrix for the decoration of ultrafine Pt nanoparticles. Noticeably, exceptional electrocatalytic properties including high activity, good antipoisoning capacity, and outstanding durability were achieved for the Pt/GR-CNTs catalyst due to its unique three-dimensional interconnected porous structure and high specific surface area.
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