Low-temperature vapour phase polymerized polypyrrole nanobrushes for supercapacitors
Low-temperature vapour phase polymerized polypyrrole nanobrushes for supercapacitors
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DOI：
10.1039/c7ta00369b
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发表时间：
2017-06
影响因子：
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通讯作者：
L. Santino;S. Acharya;Julio M. D’Arcy
中科院分区：
文献类型：
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作者：
L. Santino;S. Acharya;Julio M. D’Arcy
低温改进的气相合成允许在三维纤维衬底上沉积导电聚合物聚吡咯的高纵横比、导电和电容一维纳米结构。在不使用硬模板的情况下，可以在低至50°C的温度下沉积类似于纳米刷状的纳米纤维聚吡咯。当沉积在硬碳纸等导电衬底上时，纳米纤维在1M高氯酸锂中的1.2V窗口内显示出144.7 Fg−1的三电极比电容，且具有良好的可逆性。用聚吡咯在硬质碳纸上制备的两种电极电化学电容器的比能量为7~13W h kg−1(基于平均电极活性质量)，最大充电电压在0.6~1V之间。此外，当充电到0.6V时，器件可以进行20万次循环，并且保持了70%的初始电容。这是从气相合成纳米结构聚吡咯的重大进展。
A low-temperature modified vapour-phase synthesis allows for the deposition of high aspect ratio, conductive and capacitive one-dimensional nanostructures of the conducting polymer polypyrrole onto three-dimensional fibrous substrates. Nanofibrillar polypyrrole resembling nanobrushes can be deposited at temperatures as low as 50 °C without the use of hard templates. When deposited on a conductive substrate such as hard carbon paper, the nanofibers exhibit a three-electrode specific capacitance of 144.7 F g−1 over a 1.2 V window in 1 M lithium perchlorate with good reversibility. Two electrode electrochemical capacitors fabricated using polypyrrole on hard carbon paper exhibit a specific energy ranging from 7 to 13 W h kg−1 based on average electrode active mass with a maximum charging voltage between 0.6 and 1 V. Furthermore, the devices can undergo 200 000 cycles while retaining 70% of their initial capacitance when charged to 0.6 V. This work represents a significant advance in the synthesis of nanostructured polypyrrole from the vapor phase.