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首页> 外文期刊>ACS applied materials & interfaces >Synthesis of Fluorinated Graphene/CoAl-Layered Double Hydroxide Composites as Electrode Materials for Supercapacitors
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Synthesis of Fluorinated Graphene/CoAl-Layered Double Hydroxide Composites as Electrode Materials for Supercapacitors

机译：氟化石墨烯/煤层双氢氧化物复合材料的合成作为超级电容器的电极材料

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摘要

CoAl-layered double hydroxide/fluorinated graphene (CoAl-LDH/FGN) composites were fabricated via a two-step hydrothermal method. The synthesized CoAl-LDH/FGN composites have been characterized by powder X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), field-emission scanning electron microscopy (FESEM), energy dispersive X-ray spectroscopy (EDS), and electrochemical measurements. The results indicated that the fluorinated carbon with various configuration forms were grafted onto the framework of graphene, and the CF bond configuration and fluorine content could be tuned by the fluorination time. Most of semi-ionic CF bonds were formed at an appropriate fluorination time and, then, converted into fluorine rich surface groups (such as CF2, CF3, etc.) which were electrochemically inactive as the fluorination time prolonged. Moreover, the CoAl-LDH/FGN composites prepared at the optimal fluorination time exhibited the highest specific capacitance (1222 F/g at 1 A/g), the best rate capability, and the most stable capacitance retention, which offered great promise as electrode materials for supercapacitors.
机译：通过两步水热法制造煤层双氢氧化物/氟化石墨烯（煤LDH / FGN）复合材料。合成的煤LDH / FGN复合材料的特征在于粉末X射线衍射（XRD），傅里叶变换红外光谱（FT-IR），X射线光电子能谱（XPS），透射电子显微镜（TEM），现场排放扫描电子显微镜（FESEM），能量分散X射线光谱（EDS）和电化学测量。结果表明，具有各种构型形式的氟化碳接枝到石墨烯框架上，并且可以通过氟化时间调整CF键组和氟含量。大多数半离子CF键形成在适当的氟化时间，然后，转化为在氟化时间延长的电化学无效的氟富含氟表面基团（如CF 2，CF 3等）中。此外，在最佳氟化时间制备的煤LDH / FGN复合材料表现出最高的比电容（1222 f / g以1 a / g），最佳速率能力和最稳定的电容保留，其作为电极提供了很大的承诺超级电容器的材料。

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