可拉伸聚吡咯/棉针织物的制备及其储电性能

为赋予棉针织物导电和储电的新功能并将其用于可穿戴器件中,将吡咯单体原位聚合到棉针织物上。借助扫描电子显微镜和红外光谱仪对棉针织物和聚吡咯的微观形貌以及化学结构进行表征,并测试了聚吡咯/棉针织物在不同拉伸应变时的表面电阻及电化学性能。结果表明:聚吡咯充分附着在针织棉纤维上;当拉伸应变从0%增至40%时,织物电阻值从429.2 Ω降至231.4 Ω;织物在5 mV/s条件下的储电面积容量为680.6 mF/cm ²,在2 mA/cm² 条件下为1 014.2 mF/cm²;由聚吡咯/棉针织物组装成的对称型超级电容器在1、5 mA/cm²时的面积容量分别为229.8、161.5 mF/cm²,经过10 000次恒流充放电循环后容量保留率为76.3%。

Preparation and electric storage performance of stretchable polypyrrole/cotton knitted fabric

To endow knitted cotton fabrics with new function such as conductance and electricity storage for wearable devices, pyrrole monomers were in-situ polymerized on a knitted cotton fabric to fabricate the polypyrrole/cotton knitted fabric. Scanning electron microscope and Fourier transform infrared spectra were used to detect the morphologies and chemical structures of the polypyrrole/cotton knitted fabric. The surface resistances and the electrochemical performances of polypyrrole/cotton knitted fabric at different tensile strain were also measured. The results show that sufficient polypyrrole is coated on knitted cotton fibers, and the surface resistances decreases from 429.2 Ω to 231.4 Ω when the strain is changed from 0% to 40%. The areal capacitance of the polypyrrole/cotton knitted fabric is 680.6 mF/cm ² at the scan rate of 5 mV/s, and is 1 014.2 mF/cm² at the current density of 2 mA/cm². The symmetric supercapacitor device prepared from the polypyrrole/cotton knitted fabric shows an areal capacitance of 229.8 mF/cm² at 1 mA/cm² and 161.5 mF/cm² at 5 mA/cm², and this device exhibits a capacitance retention of 76.3% after 10 000 galvanostatic charging/discharging cycles.