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首页> 外文期刊>RSC Advances >Self-assembled reduced graphene hydrogels by facile chemical reduction using acetaldehyde oxime for electrode materials in supercapacitors
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Self-assembled reduced graphene hydrogels by facile chemical reduction using acetaldehyde oxime for electrode materials in supercapacitors

机译：通过使用乙醛肟的体内化学减少自组装的石墨烯水凝胶，用于超级电容器中的电极材料

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Self-assembled three-dimensional (3D) reduced graphene hydrogels (RGHs) were fabricated by the facile chemical reduction of a graphene oxide (GO) dispersion with ammonia using acetaldehyde oxime as reducing and doping agent. The chemical reduction of GO was confirmed by Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and Raman spectroscopy. The hierarchical porosity and structures of the resulting RGHs can be demonstrated by field emission scanning electron microscopy (FESEM) and N _(2) sorption experiments. Benefiting from the developed porosity with micro-meso hierarchical pore texture, the specific capacitance of RGHs exhibited high specific capacitances of 230.4, 155.3, 234.2, 155.1 and 191.8 F g ~(?1) at 0.3 A g ~(?1) for RGHs-1, RGHs-2, RGHs-5, RGHs-10 and RGHs-15 in 6 M KOH electrolyte, respectively. More importantly, the RGHs maintained high capacitances of 167.1, 110.4, 142.3, 106.9 and 142.3 F g ~(?1) (the retention rates are 72.5, 71.1, 60.8, 68.9 and 74.2% for RGHs-1, RGHs-2, RGHs-5, RGHs-10 and RGHs-15) at a very high current density of 20 A g ~(?1) , indicating good electrochemical stability and a high degree of reversibility in the repetitive charge/discharge cycling test.
机译：通过使用乙醛肟作为还原剂和掺杂剂，通过使用乙醛肟的石墨烯（GO）分散的石墨烯（GO）分散的容易的化学降低来制造自组装的三维（3D）的石墨烯水凝胶（RGHs）。通过傅里叶变换红外光谱（FT-IR），X射线光电子能谱（XPS），X射线衍射（XRD）和拉曼光谱来证实Go的化学还原。通过现场发射扫描电子显微镜（FESEM）和N _（2）吸附实验，可以证明所得RGH的分层孔隙率和结构。从发发的孔隙率与微米级层次孔隙纹理中受益，RGH的比电容表现出230.4,155.3,234.2,155.1和191.8 f g〜（α1）的高比电容在0.3 a g〜（β1）中，为Rghs -1，RGHS-2，RGHS-5，RGHS-10和RGHS-15分别为6M KOH电解质。更重要的是，RGHS保持高电容为167.1,110.4,142.3,106.9和142.3 f g〜（α1）（保留率为72.5,71.1,60.8,68.9​​和74.2％，RGHS-1，RGHS-2，RGHs -5，RGHS-10和RGHS-15）以20A G〜（α1）的非常高的电流密度，表明在重复充电/放电循环试验中具有良好的电化学稳定性和高度可逆性。

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