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    康萌, 王鹏飞, 王蒙, 吴强, 柯晓玲, 周建华. 聚吡咯/MnO2纸电极的制备及光热效应增强电容性能[J]. 功能高分子学报, 2021, 34(5): 490-496. doi: 10.14133/j.cnki.1008-9357.20210131001
    引用本文: 康萌, 王鹏飞, 王蒙, 吴强, 柯晓玲, 周建华. 聚吡咯/MnO2纸电极的制备及光热效应增强电容性能[J]. 功能高分子学报, 2021, 34(5): 490-496. doi: 10.14133/j.cnki.1008-9357.20210131001
    KANG Meng, WANG Pengfei, WANG Meng, WU Qiang, KE Xiaoling, ZHOU Jianhua. Preparation of Polypyrrole/MnO2 Paper Electrode and Its Photothermal Effect to Enhanced Capacitor Performance[J]. Journal of Functional Polymers, 2021, 34(5): 490-496. doi: 10.14133/j.cnki.1008-9357.20210131001
    Citation: KANG Meng, WANG Pengfei, WANG Meng, WU Qiang, KE Xiaoling, ZHOU Jianhua. Preparation of Polypyrrole/MnO2 Paper Electrode and Its Photothermal Effect to Enhanced Capacitor Performance[J]. Journal of Functional Polymers, 2021, 34(5): 490-496. doi: 10.14133/j.cnki.1008-9357.20210131001

    聚吡咯/MnO2纸电极的制备及光热效应增强电容性能

    Preparation of Polypyrrole/MnO2 Paper Electrode and Its Photothermal Effect to Enhanced Capacitor Performance

    • 摘要: 通过湿化学法与低温界面聚合法在慢速滤纸上依次沉积二氧化锰(MnO2)与聚吡咯(PPy),制备出PPy/MnO2纸基复合材料。利用红外光谱、扫描电镜、循环伏安、恒电流充放电、交流阻抗等手段对该复合材料的结构和性能进行了表征。研究表明:PPy的沉积较好地保留了滤纸的多孔结构,并能覆盖MnO2颗粒,形成较大活性面积;其中MnO2/PPy-400单电极的比电容可达1 487.1 mF/cm2;在光强为1 kW/m2的模拟太阳光下,组装的对称型超级电容器的比电容是在无光照条件下的5倍,表现出优异的光热效应增强性能。

       

      Abstract: The performance of supercapacitor degenerates at low temperature, even fails to work sometimes. Solar photothermal conversion provides a new direction for the performance improvement of supercapacitor. Manganese dioxide (MnO2) has a high specific capacity, while it should be compounded with other active materials due to its low electric conductivity. Therefore, this study aimed to improve the performance of MnO2-based supercapacitor using the photothermal effect of polypyrrole (PPy), which exhibited excellent light absorption ability and pseudocapacitance property. MnO2 and PPy were successively deposited on slow filter paper by wet chemistry method and low-temperature interfacial polymerization approach, and PPy/MnO2 paper-based composites with different PPy contents were prepared. The structures and properties of the composites were characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, cyclic voltammetry, galvanostatic charge/discharge, and AC impedance spectroscopy. The results showed that the porous structure of filter paper was well preserved after PPy deposition, and MnO2 was covered to form a large active area. The specific capacitance of MnO2/PPy-400 single electrode reached 1 487.1 mF/cm2, 67% higher than that of pure PPy electrode. Under the simulated sunlight with the intensity of 1 kW/m2, the surface temperature of the assembled symmetrical supercapacitor increased from 21.2 °C to 46.7 °C after 10 min. The specific capacitance of the symmetrical supercapacitor assembled by the paper electrode with PPy of 400.0 μL was 52.9 mF/cm2 with illumination, five times that in dark, suggesting excellent photothermal effect to enhanced capacitor performance.

       

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