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首页> 外文期刊>Organic Electronics >The effect of aminophenol isomers on the reduced graphene oxide hydrogels' microstructure and capacitive performances
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The effect of aminophenol isomers on the reduced graphene oxide hydrogels' microstructure and capacitive performances

机译：氨基酚异构体对还原氧化石墨烯水凝胶的微观结构和电容性能的影响

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摘要

To enhance the reduced graphene oxide hydrogels' capacitive performance, many modifiers are used to add doped element into the materials and improve the structure. The isomers of aminophenol which contain amino and hydroxyl groups on the benzene ring are employed as structure regulator and modifier to synthesize high-performance reduced graphene oxide hydrogels. The influences of preparation conditions including ratios of graphene oxide to aminophenol isomers, temperature, reaction times on the samples' structure and properties have been investigated. The results show that the oligomer of o-aminophenol is formed on reduced graphene oxide sheets while the molecules of p, m-aminophenol are bound to the sheets; and that the hydrogel prepared in the presence of p-aminophenol has larger specific surface area, total pore volume, specific capacitance and good rate capability (74.0% of 427.0 F g(-1) retains at 100 mV s(-1)) than other. The cells assembled by the optimized hydrogels exhibit the energy density of 14.07 Wh kg(-1) at power density of 124.3W kg(-1), and 4.96 Wh kg(-1) at 6.78 kW kg(-1). Furthermore, 92.2% of initial capacitance can be retained after 20,000 cycles for the cells assembled by the optimal hydrogel. This kind of material may be found its use in energy storage field.
机译：为了增强还原的氧化石墨烯水凝胶的电容性能，许多改性剂用于将掺杂元素添加到材料中并改善结构。苯环上含有氨基和羟基的氨基苯酚异构体被用作结构调节剂和改性剂，以合成高性能的还原型氧化石墨烯水凝胶。研究了氧化石墨烯与氨基酚异构体的比例，温度，反应时间等制备条件对样品结构和性能的影响。结果表明，邻氨基苯酚的低聚物是在还原的氧化石墨烯片上形成的，而对位，间氨基苯酚的分子则与该片结合。并且在对氨基苯酚存在下制备的水凝胶具有比表面积更大，总孔体积，比电容和良好的倍率能力（427.0 F g（-1）的74.0％保留在100 mV s（-1）处）其他。由优化水凝胶组装的电池在124.3W kg（-1）的功率密度下显示出14.07 Wh kg（-1）的能量密度，在6.78 kW kg（-1）的功率密度下显示出4.96 Wh kg（-1）。此外，对于通过最佳水凝胶组装的电池，在20,000个循环之后，可以保留92.2％的初始电容。可以发现这种材料在储能领域中的用途。

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