Effect of supercritical CO(2) on fabrication of free-standing hierarchical graphene oxide/carbon nanofiber/polypyrrole film and its electrochemical property.
Effect of supercritical CO(2) on fabrication of free-standing hierarchical graphene oxide/carbon nanofiber/polypyrrole film and its electrochemical property.
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DOI：
10.1039/c3cp54957g
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发表时间：
2014-03
期刊：
影响因子：
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通讯作者：
Shanshan Xu;Hongxia Yang;Kaixi Wang;Bo Wang;Qun Xu
中科院分区：
文献类型：
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作者：
Shanshan Xu;Hongxia Yang;Kaixi Wang;Bo Wang;Qun Xu
在本文中，首次报道了超临界二氧化碳（SC CO2）有助于制备独特的柔性独立式氧化石墨烯/纳米纤维（GC）薄膜。通过原位聚合工艺制备了沉积在 GO/CNF-SC (GC-SC) 薄膜上的新型分级优质电极材料。我们的实验结果表明，SC CO2 不仅可以扩大 GO 片之间的空间，而且可以提高薄膜的导电性。电化学测量表明，作为电极材料，所获得的 PPy 涂层 GC-SC 产品比原始 GC/PPy 产品表现出明显更高的电容性能。在连续充放电循环过程中观察到优异的倍率性能和稳定的电容保持率（5000次循环后为89%），这验证了SC CO2为分级生产GO/CNF/PPy薄膜提供了便捷的途径，可用于超级电容器的潜在应用。
In this paper, supercritical carbon dioxide (SC CO2) was first reported to help prepare unique flexible free-standing graphene oxide/nanofiber (GC) films. A novel hierarchical superior electrode material with polypyrrole (PPy) deposited on GO/CNF-SC (GC-SC) films was prepared via an in situ polymerization process. Our experimental results indicate that SC CO2 can not only enlarge the space between GO sheets but also improve the conductivity of the films. The electrochemical measurements show that the as-obtained PPy-coated GC-SC products display remarkably higher capacitive properties than pristine GC/PPy products as electrode materials. Excellent rate performance and stable capacitance retention (89% after 5000 cycles) were observed during the continuous charge-discharge cycles, which verify that SC CO2 provides a convenient route to the scalable production of hierarchical GO/CNF/PPy films for potential application in supercapacitors.