Highly stretchable and flexible supercapacitors based on electrospun PEDOT:SSEBS electrodes,Journal of Materials Chemistry A

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Highly stretchable and flexible supercapacitors based on electrospun PEDOT:SSEBS electrodes
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2022-09-14 , DOI: 10.1039/d2ta04476e
Muhamed Shareef Kolathodi _{1,

2} , Alireza Akbarinejad _{1,

3} , Cherie Tollemache ₁ , Peikai Zhang _{1,

3} , Jadranka Travas-Sejdic _{1,

3}

Affiliation

Stretchable and flexible supercapacitors with high energy and power densities are in demand for applications in wearable electronics. Here we report a highly stretchable and flexible supercapacitor based on electrospun PEDOT:SSEBS microfiber mats as the supercapacitor electrodes and a freeze-thawed PVA-H₂SO₄ hydrogel as the solid-state electrolyte. The electrodes are prepared by electrospinning of porous SSEBS microfiber mats and oxidative polymerisation of PEDOT on the mats, from a range of PEDOT solution concentrations. A full electrochemical analysis of the electrodes, including conductivity measurements, cyclic voltammometry, galvanostatic charge–discharge and the electrochemical impedance spectroscopy, is performed, as well as stress–strain mechanical analysis. The maximum areal capacitance of the electrodes, optimised in terms of PEDOT content, is 1296 mF cm⁻². The stretchable supercapacitor devices retain 89.5% of the initial capacitance after being stretched to 500% with the electrodes made of 0.5 M PEDOT:SSEBS. The electrode prepared with 1.0 M PEDOT:SSEBS has a maximum areal capacitance of 996 mF cm⁻² and retains 100% of its initial capacitance after bending to 180°. These outstanding performances can be attributed to the highly porous and interconnected voids in the electrospun fibers and their stable mechanical properties upon stretching and bending cycles.

中文翻译：

基于静电纺丝 PEDOT:SSEBS 电极的高度可拉伸和柔性超级电容器

可穿戴电子产品的应用需要具有高能量和功率密度的可拉伸和柔性超级电容器。在这里，我们报告了一种基于电纺 PEDOT:SSEBS 微纤维垫作为超级电容器电极和冻融 PVA-H ₂ SO _{4的高度可拉伸和柔性超级电容器}水凝胶作为固态电解质。电极是通过多孔 SSEBS 微纤维垫的静电纺丝和垫上 PEDOT 的氧化聚合来制备的，从一系列 PEDOT 溶液浓度。对电极进行了全面的电化学分析，包括电导率测量、循环伏安法、恒电流充放电和电化学阻抗谱，以及应力-应变力学分析。在PEDOT含量方面优化的电极的最大面电容为1296 mF cm ^-2。可拉伸超级电容器器件在使用 0.5 M PEDOT:SSEBS 制成的电极拉伸至 500% 后保留 89.5% 的初始电容。用 1.0 M PEDOT:SSEBS 制备的电极的最大面积电容为 996 mF cm^-2并在弯曲到 180° 后保持 100% 的初始电容。这些出色的性能可归因于电纺纤维中的高度多孔和相互连接的空隙，以及它们在拉伸和弯曲循环中的稳定机械性能。

更新日期：2022-09-14

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