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Differences between graphene and graphene oxide in gelatin based systems for transient biodegradable energy storage applications

机译：基于明胶基的石墨烯和石墨烯氧化物的差异瞬态可生物降解储能应用

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摘要

A comparison between graphene flakes and graphene oxide as filler in gelatin based systems for low-cost transient biodegradable energy storage applications has been carried out. The two bio-composites have been prepared and characterized by rheological measurements, cyclic voltammetry measurements, chronopotentiometry measurements and impedance spectroscopy. Differences in dielectric and mechanical properties have been correlated to the different structural organizations determinate by the hydrophobic/hydrophilic character of the used filler. In particular, the addition of the graphene oxide to the gelatin causes an increase in the elastic modulus with a parallel increase in the mechanical stability with time as compared to the composites obtained by adding graphene. Conversely, the surface capacitance is slightly increased by the graphene oxide addition compared to the pure gelatin sample. On the other hand, the introduction of the graphene flakes into the gelatin leads to a marked increase of the dielectric properties of the resulting bio-composite.
机译：已经进行了石墨烯薄片和石墨烯氧化物的比较，作为用于低成本瞬时可生物降解的能量存储应用的明胶基系统中的填料。已经制备了两种生物复合材料，其特征是通过流变测量，循环伏安法测量，时间计量测量测量测量和阻抗光谱。介电和机械性能的差异已经与通过使用填料的疏水/亲水性特性确定的不同结构组织相关。特别地，与通过加入石墨烯获得的复合材料相比，将石墨烯氧化物加入明胶导致弹性模量的增加，其具有平行的机械稳定性。相反，与纯明胶样品相比，通过石墨烯添加的表面电容略微增加。另一方面，将石墨烯薄片引入明胶导致所得生物复合材料的介电性质的显着增加。

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