多孔碳化聚苯胺纳米片的制备及其性能研究

Preparation and property of porous carbonized polyaniline nanosheet

先通过原位聚合制备聚苯胺(PANI),然后经过碳化处理制备了多孔的碳化聚苯胺(C-PANI)纳米片。分别利用TEM、FT-IR、XRD、全自动比表面及孔隙度分析仪及恒流充放电等对其形貌、表面结构、晶体结构、比表面积及电容性能进行表征,并对该纳米片的形成机理进行了探讨。同时,电容性能测试结果表明该纳米片显示较理想的电容值,这可能归因于碳化聚苯胺纳米片拥有较大的比表面积,有利于电解液离子的传输和渗透;碳化聚苯胺中氮元素的存在使其又具有赝电容效应,也有助于电容性能的提高。

Porous carbonized polyaniline （C-PANI） nanosheet has been successfully synthesized via in-situ polymerization and subsequent carbonization. Morphology, surface structures, crystalline structures, BET surface area and electrochemical properties were characterized by transmission electron microscopy, fourier transform infrared spectroscopy, X-ray diffractometer, ASAP 2020 surface area and porosity analyzer and galvanostatic charge-discharge measurements, respectively. Moreover, the formating mechanism of porous nanosheet was discussed. The results displaied that the nanosheet showed a higher specific capacitance, which can be attributed to the enhanced specific surface area, so can accelerate the transportation and permeation of electrolyte ions. It was also conducive to increase specific capacitance because of introducing pseudocapacitance effects due to nitrogen groups from the carbonized PANI.