整体
材料科学
石墨烯
超级电容器
聚合物
石墨烯泡沫
纳米技术
模板
化学工程
电极
化学气相沉积
共聚物
小旋翼机
氧化石墨烯纸
复合材料
电容
有机化学
催化作用
工程类
物理化学
化学
作者
Kewei Liu,Yuming Chen,Gina M. Policastro,Matthew L. Becker,Yu Zhu
出处
期刊:ACS Nano
[American Chemical Society]
日期:2015-06-11
卷期号:9 (6): 6041-6049
被引量:57
标识
DOI:10.1021/acsnano.5b01006
摘要
The two-dimensional single-layer and few-layered graphene exhibit many attractive properties such as large specific surface area and high charge carrier mobility. However, graphene sheets tend to stack together and form aggregates, which do not possess the desirable properties associated with graphene. Herein, we report a method to fabricate three-dimensional (3D), bicontinuous graphene monolith through a versatile hollow nickel (Ni) template derived from polymer blends. The poly(styrene)/poly(ethylene oxide) were used to fabricate a bicontinuous gyroid template using controlled phase separation. The Ni template was formed by electroless metal depositing on the polymer followed by removing the polymer phase. The resulting hollow Ni structure was highly porous (95.2%). Graphene was then synthesized from this hollow Ni template using chemical vapor deposition and the free-standing bicontinuous graphene monolith was obtained in high-throughput process. Finally, the bicontinuous graphene monolith was used directly as binder-free electrode in supercapacitor applications. The supercapacitor devices exhibited excellent stability.
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