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High‐Performance PVA/PEDOT:PSS Hydrogel Electrode for All‐Gel‐State Flexible Supercapacitors
Advanced Materials Technologies ( IF 6.4 ) Pub Date : 2020-12-06 , DOI: 10.1002/admt.202000919 Qifan Liu 1 , Jianhui Qiu 1 , Chao Yang 2 , Limin Zang 2 , Guohong Zhang 1 , Eiichi Sakai 1
Advanced Materials Technologies ( IF 6.4 ) Pub Date : 2020-12-06 , DOI: 10.1002/admt.202000919 Qifan Liu 1 , Jianhui Qiu 1 , Chao Yang 2 , Limin Zang 2 , Guohong Zhang 1 , Eiichi Sakai 1
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Flexible supercapacitors are widely favored because they can provide a stable energy supply under different deformations. However, how to avoid the delamination of flexible matrix and electroactive materials under high deformation and balance mechanical durability and electrochemical performance is still an urgent problem to be overcome. Here, a hybrid polyvinyl alcohol/poly(3,4‐ethylenedioxythiophene): polystyrene sulfonate (PVA/PEDOT:PSS) hydrogel electrode with 3D interpenetrated network structure is prepared by the freeze–thaw crosslinking and solution immersion method. Due to the strong intermolecular force between PVA and PEDOT:PSS, coupling with the use of liquid phase mixing, this hybrid hydrogel electrode shows uniform interconnectivity and robust mechanical properties. The all‐gel‐state flexible supercapacitor based on the PVA/PEDOT:PSS hydrogel is fabricated to demonstrate its excellent mechanical durability of which capacitance retention retains 98.1% after 1000 bending cycles as well as excellent electrochemical performance whose areal specific capacitance is 128.9 mF cm−2 and energy density is up to 11.46 μWh cm−2. Moreover, it can continuously power the liquid‐crystal display (LCD) watch in bending, compression, and low‐temperature environments. The outstanding comprehensive performance of this supercapacitor indicates that it has the potential to be used in a new generation of flexible energy storage devices.
中文翻译：
用于全凝胶态柔性超级电容器的高性能PVA / PEDOT：PSS水凝胶电极
柔性超级电容器受到广泛青睐，因为它们可以在不同的变形下提供稳定的能量供应。然而，如何避免柔性基体和电活性材料在高变形下分层并平衡机械耐久性和电化学性能仍然是亟待解决的问题。在这里，通过冻融交联和溶液浸泡法制备了具有3D互穿网络结构的杂化聚乙烯醇/聚（3,4-乙撑二氧噻吩）：聚苯乙烯磺酸盐（PVA / PEDOT：PSS）水凝胶电极。由于PVA和PEDOT：PSS之间的强大分子间作用力以及液相混合的使用，这种混合水凝胶电极表现出均匀的互连性和强大的机械性能。基于PVA / PEDOT的全凝胶态柔性超级电容器：-2和能量密度高达11.46μWhcm -2。此外，它可以在弯曲，压缩和低温环境下连续为液晶显示器（LCD）手表供电。该超级电容器出色的综合性能表明，它有潜力用于新一代的柔性储能设备中。
更新日期：2021-01-05
中文翻译：
用于全凝胶态柔性超级电容器的高性能PVA / PEDOT：PSS水凝胶电极
柔性超级电容器受到广泛青睐，因为它们可以在不同的变形下提供稳定的能量供应。然而，如何避免柔性基体和电活性材料在高变形下分层并平衡机械耐久性和电化学性能仍然是亟待解决的问题。在这里，通过冻融交联和溶液浸泡法制备了具有3D互穿网络结构的杂化聚乙烯醇/聚（3,4-乙撑二氧噻吩）：聚苯乙烯磺酸盐（PVA / PEDOT：PSS）水凝胶电极。由于PVA和PEDOT：PSS之间的强大分子间作用力以及液相混合的使用，这种混合水凝胶电极表现出均匀的互连性和强大的机械性能。基于PVA / PEDOT的全凝胶态柔性超级电容器：-2和能量密度高达11.46μWhcm -2。此外，它可以在弯曲，压缩和低温环境下连续为液晶显示器（LCD）手表供电。该超级电容器出色的综合性能表明，它有潜力用于新一代的柔性储能设备中。
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