Bioinspired nanostructural peptide materials for supercapacitor electrodes
Bioinspired nanostructural peptide materials for supercapacitor electrodes
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DOI：
10.1557/jmr.2010.0213
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发表时间：
2010-08-01
影响因子：
2.7
通讯作者：
Rosenman, G.
中科院分区：
文献类型：
--
作者：
Beker, P.;Rosenman, G.
自组装生物启发肽纳米管（PNT）表现出不同的物理特性，如光学，压电，流体等，在这项工作中，我们提出了我们的研究环境清洁的生物启发肽纳米结构材料，将应用于能量存储设备超级电容器（SC）。这种应用是基于我们最近开发的PNT物理气相沉积技术。研究发现，PNT的精细结构及其在电解液中的润湿性是SC电容发生强烈变化的关键因素。我们表明，PNT涂层的碳电极将双层电容放大了几十倍;在硫酸中达到800 μ F/cm（2）（归一化为碳背景电极的电极几何表面积）。所发现的效果是由具有许多亲水性纳米尺度直径通道的中空PNT提供的，这些通道沿PNT轴沿着伸长，这显著增加了碳电极的功能面积。观察到的PNT形态的另一种类型是纤维状的高度疏水的PNT棒，其不有助于SC电容。
Self-assembly bioinspired peptide nanotubes (PNT) demonstrate diverse physical properties such as optical, piezoelectric, fluidic, etc. In this work, we present our research on environmentally clean bioinspired peptide nanostructured material, to be applied to energy storage devices-supercapacitors (SC). Such an application is based on our recently developed PNT physical vapor deposition technology. It has been found that PNT fine structure and its wettability in electrolytes are the critical factors for a strong variation of the SC capacitance. We show that PNT-coated carbon electrodes enlarge the double-layer capacitance by dozens of times; reaching 800 mu F/cm(2) in a sulfuric acid (normalizing to the electrode geometric surface area of carbon background electrode). The discovered effect is provided by hollow PNT possessing numerous hydrophilic nanoscale-diameter channels, elongated along the PNT axis, which dramatically increase the functional area of carbon electrodes. Another type of the observed PNT morphology is fiberlike highly hydrophobic PNT rods, which do not contribute to the SC capacitance.