电致变色储能设备兼具电致变色与储能功能,可以通过实时颜色变化指示储能状态,在节能建筑和智能电子领域备受瞩目.聚苯胺(PANI)具有丰富的颜色变化以及较高的理论比电容,在电致变色及储能领域均占有一席之地.本文为提高聚苯胺的电容,在用恒电流法制备聚苯胺膜时加入具有氧化还原活性的活性蓝19(RB19),通过静电相互作用对聚苯胺进行掺杂,分析了苯胺与RB19的比例以及沉积时间对聚苯胺膜的形貌及电化学性能的影响,以沉积有聚苯胺薄膜的氧化铟锡(ITO)导电玻璃作为工作电极、ZnCl2作为电解液、锌片作为对电极组装电致变色储能器件,并对其进行研究.结果表明:活性蓝19的掺杂极大地提升了聚苯胺膜的电容,在50 mV/s的扫描速率下,PANI-RB19100∶1(20min)的电容(C)可达PANI(20min)的3.29倍,在0.1 mA·cm-2的电流密度下,可获得32.41 mF·cm-2的面积比电容(Ca),电流密度增大10倍,有78.06％的电容保持率;电致变色储能器件在750 nm处可产生56.22％的光谱调制幅度,将两个器件串联可点亮红色LED灯组超过3 h.
Preparation and Performance of Polyaniline Based Electrochromic Energy Storage Device
Electrochromic energy storage devices have both electrochromic and energy storage functions,and can indicate the energy storage status through real-time color changes.They have attracted attention in the fields of energy-efficient buildings and intelligent electronics.Polyaniline(PANI)has rich color changes and a high theoretical specific capacitance,and occupies a place in the fields of electrochromism and energy storage.In this study,in order to improve the capacitance of polyaniline,reactive blue 19(RB19)with redox activity was added when the polyaniline film was prepared via galvanostatic method,and polyaniline was doped by electrostatic interaction.The effects of the ratio of aniline to reactive blue 19 and the deposition time on the morphology and electrochemical performance of the polyaniline film were analyzed.The electrochromic energy storage device was assembled using indium-tin oxide(ITO)conductive glass with polyaniline film as the working electrode,ZnCl2 as the electrolyte,and zinc flake as the counter electrode,and the performance was studied.The results show that the doping of reactive blue 19 greatly enhances the capacitance of polyaniline film.At a scan rate of 50 mV/s,the capacitance(C)of PANI-RB19100∶1(20min)can reach 3.29 times that of PANI(20min).At a current density of 0.1 mA·cm-2,an area capacitance(Ca)of 32.41 mF·cm-2 can be obtained,and a ten fold increase in current density results in a capacitance retention rate of 78.06％.The electrochromic energy storage device can generate 56.22％spectral modulation amplitude at 750 nm,and connecting the two devices in series can light up a red LED lights more than 3 h.
ElectrochromicEnergy storagePolyanilineReactive blue 19
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