聚合物支撑石墨烯离子液滴运动发电机理

2019/03/06   下载量： 1 次

方案摘要

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应用领域 材料
检测样本 石墨烯
检测项目
参考标准 暂无

采用由立陶宛Ekspla公司的皮秒激光器和光学参量发生器搭建了和频振动光谱测量系统，对聚合物支撑石墨烯离子液滴运动产生电能的微观机理进行了实验研究。

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      Graphene-based electric power generation that converts mechanical energy of flow of ionic droplets over the device surface into electricity has emerged as promising candidate for a blue-energy network. Yet the lack of a microscopic understanding of the underlying mechanism has prevented ability to optimize and control the performance of such devices. This requires information on interfacial structure and charging behavior at the molecular level. Here, we use sum-frequency vibrational spectroscopy (SFVS) to probe the interfaces of
devices composed of aqueous solution, graphene and supporting polymer substrate. We discover that the surface dipole layer of the polymer is responsible for ion attraction toward and adsorption at the graphene surface that leads to electricity generation in graphene. Graphene itself does not attract ions and only acts as a conducting sheet for the induced carrier transport. Replacing the polymer by an organic ferroelectric substrate could enhance the efficiency and allow switching of the electricity generation. Our microscopic understanding of the electricity generation process paves the way for the rational design of scalable and more efficient droplet-motion-based energy transducer devices.

上一篇 在一个双稳湍流涡旋火焰中，对间歇性动态的时间-频率定位
下一篇 重负离子复合物在软电荷界面形成独特的水结构

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北京欧兰科技发展有限公司
金牌会员 丨 第17年
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