Lee Do Geun, Lee Byeong Chul, Jung Kyung-Hye
School of Advanced Materials and Chemical Engineering, Daegu Catholic University, Gyeongsan, Gyeongbuk 38430, Korea.
Polymers (Basel). 2021 Feb 26;13(5):720. doi: 10.3390/polym13050720.
Highly porous carbon electrodes for supercapacitors with high energy storage performance were prepared by using a new precursor blend of aromatic polyimide (PI) and polyvinylidene fluoride (PVDF). Supercapacitor electrodes were prepared through the electrospinning and thermal treatment of the precursor blends of aromatic PI and PVDF. Microstructures of the carbonized PI/PVDF nanofibers were studied using Raman spectroscopy. Nitrogen adsorption/desorption measurements confirmed their high surface area and porosity, which is critical for supercapacitor performance. Energy storage performance was investigated and carbonized PI/PVDF showed a high specific capacitance of 283 F/g at 10 mV/s (37% higher than that of PI) and an energy density of 11.3 Wh/kg at 0.5 A/g (27% higher than that of PI) with high cycling stability.
通过使用芳香族聚酰亚胺（PI）和聚偏氟乙烯（PVDF）的新型前驱体共混物，制备了具有高储能性能的用于超级电容器的高孔隙率碳电极。通过对芳香族PI和PVDF前驱体共混物进行静电纺丝和热处理来制备超级电容器电极。使用拉曼光谱研究了碳化PI/PVDF纳米纤维的微观结构。氮气吸附/脱附测量证实了它们具有高比表面积和孔隙率，这对于超级电容器性能至关重要。对储能性能进行了研究，碳化PI/PVDF在10 mV/s时显示出283 F/g的高比电容（比PI高37%），在0.5 A/g时能量密度为11.3 Wh/kg（比PI高27%），并且具有高循环稳定性。
