Wang Jingping, Cao Jinan, Xu Youlong, An Haixia, Li Xifei
Electronic Materials Research Laboratory, KeyLaboratory of the Ministry of Education & International Center for Dielectric Research, School of Electronic Science and Engineering and Shanxi Engineering Research Center of Advanced Energy Materials & Devices, School of Electronic Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, China.
College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China.
Phys Chem Chem Phys. 2023 Apr 12;25(15):10925-10934. doi: 10.1039/d3cp00336a.
Flexible energy storage systems have become attractive alternatives for applications in wearable energy storage and sensor devices. This study reports a simple electro-polymerization method for the fabrication of PPy films coated on PPy nanotubes (PPy NTs), which are binding-free, self-standing, and could be used as a flexible electrode for supercapacitors. With optimized kinetics for ion transportation, the mass specific capacitance of the flexible porous PPy films can be elevated to 1.36 F cm at a charging/discharging rate of 2 mA cm (0.45 A g). The mass specific capacitance of the flexible porous PPy films reaches 6.5 times as large as that of compact PPy films at a scan rate of 20 mV s. Furthermore, due to the large free space for volume change, the capacitance fading of the flexible porous PPy films is less than 3% after 10 000 cycles. This novel design provides an efficient method to synthesize high-performance, flexible and low-cost materials used in supercapacitors.
柔性储能系统已成为可穿戴储能和传感器设备应用中颇具吸引力的替代方案。本研究报告了一种用于制备涂覆在聚吡咯纳米管（PPy NTs）上的聚吡咯薄膜的简单电聚合方法，该薄膜无粘结、自立，可用作超级电容器的柔性电极。通过优化离子传输动力学，柔性多孔聚吡咯薄膜在2 mA cm（0.45 A g）的充放电速率下，质量比电容可提高到1.36 F cm。在20 mV s的扫描速率下，柔性多孔聚吡咯薄膜的质量比电容是致密聚吡咯薄膜的6.5倍。此外，由于体积变化的自由空间大，柔性多孔聚吡咯薄膜在10000次循环后的电容衰减小于3%。这种新颖的设计提供了一种高效的方法来合成用于超级电容器的高性能、柔性和低成本材料。
