Stretchable Electrospun Nanofiber Energy Storage Smart Textile

• Main Authors: Hung, Hsiao-Lan, 洪筱嵐
• Other Authors: 李文亞
• Format: Others
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/7j858e

碩士 === 國立臺北科技大學 === 化學工程研究所 === 105 === In recent years, the development of stretchable wearing devices with small size, light weight, high flexibility is a main direction. For this reason, it is important to design stretchable energy storage devices. Among many energy storage technologies, supercapacitors have a high power density and a long cycle life, making it more suitable for wearable devices. Therefore, this study mainly focuses on stretchable supercapacitors. We used electrospinning SBS rubber/Ag particles composite fibers as a conductive electrode and then coated polyaniline solution for supercapacitor. Due to the electrospinning electrode with larger surface area, the contact area between the electrolyte and polyaniline can be significantly increase. In addition, its remarkable mechanical compliance have a great advantage on the production of stretchable supercapacitor. After the electrochemical analysis and testing, the non-woven electrode and the fiber-shape electrode showed high performance. Their specific capacitance can reach 581 F/g for the non-woven electrode and 645 F/g for the fiber-shape electrode, respectively. After the 1000 charge/discharge cycles, the specific capacitance values of the nonwoven and fiber-shape electrodes are 300 F/g and 440 F/g, respectively. The specific capacitance values of the nonwoven and fiber-shape electrodes are 470 F/g and 550 F/g when stretching to 100% of the original length. For stretch stability test of 20% and 50% for 500 times, the specific capacitance can also maintain more than 45% of the original capacitance value. We also found that the fiber-shape supercapacitor’s specific capacitance and cycle life higher than the non-woven supercapacitor. Furthermore, when the supercapacitor is stretched to 100% strain, both the nonwoven and fiber-shaped supercapacitors still exhibited high capacitance. Additionally, we integrate two ES nanofiber electrodes and one ES nanofiber separator as an all electrospun fiber-based energy storage devices. The all ES-fiber-based stretchable supercapacitors showed stable and great charge storage capability.