Flexible and freestanding PANI: PSS/CNF nanopaper electrodes with enhanced electrochemical performance for supercapacitors
Flexible and freestanding PANI: PSS/CNF nanopaper electrodes with enhanced electrochemical performance for supercapacitors
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DOI：
10.1016/j.jpowsour.2022.232071
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发表时间：
2022-11
影响因子：
9.2
通讯作者：
Yue Liang;Zhen Wei;Hung-En Wang;Martin Flores;Ruigang Wang;Xinyu Zhang
中科院分区：
文献类型：
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作者：
Yue Liang;Zhen Wei;Hung-En Wang;Martin Flores;Ruigang Wang;Xinyu Zhang
随着便携式和可穿戴电子产品市场的快速扩张，开发可持续的、具有成本效益的、柔性的储能电极至关重要。本文采用原位聚合和真空过滤的方法制备了一种柔性的、独立的、无粘结剂的聚苯胺：聚（4-苯乙烯磺酸钠）/纤维素纳米纸（PANI: PSS/CNP）电极。选择具有三维（3D）分层多孔结构的低成本环保纳米纤维素作为衬底，不仅降低了生产成本，而且提高了PANI: PSS/CNP的电解质吸收、柔韧性和机械强度。独立式无粘结剂结构简化了制备工艺，增加了电极中活性物质的质量负荷，有利于电极利用率的最大化。由于纤维素与PANI: PSS配合物的有效结合，PANI: PSS/CNP电极具有较高的比电容（2.56 F/cm2）、优良的循环稳定性（81.5%的电容保留率，8000次循环）、机械强度、电导稳定性和柔韧性。采用聚苯胺：PSS/CNP电极构建了对称型超级电容器器件，具有出色的面比电容（460 mF/cm2）和高能量密度（40.9 μWh/cm2）。我们的工作为未来生产可持续、低成本和节能的柔性电极材料提供了一种新颖而经济的方法。
With the fast-expanding markets of portable and wearable electronics, the development of sustainable, cost-effective, and flexible electrodes for energy storage applications is critical. Herein, a flexible, freestanding, binder-free polyaniline: poly (sodium 4-styrene sulfonate)/cellulose nanopaper (PANI: PSS/CNP) electrode was prepared using an in situ polymerization with a facile vacuum filtration approach. The low-cost and environmentally friendly nanocellulose with a three-dimensional (3D) hierarchical porous structure was chosen as the substrate that not only reduced the production cost but also improved the electrolyte absorption, flexibility, and mechanical strength for PANI: PSS/CNP. The freestanding and binder-free structure simplifying the preparation process and increasing the mass loading of the active material in the electrode was beneficial to maximizing electrode utilization. Due to the effective combination of cellulose and PANI: PSS complex, PANI: PSS/CNP electrode exhibited high specific capacitance (2.56 F/cm2) with excellent cycling stability (81.5% capacitance retention, 8000 cycles), mechanical strength, conductance stability, and flexibility. A symmetric supercapacitor device was constructed with PANI: PSS/CNP electrodes, showing outstanding areal specific capacitance (460 mF/cm2) and high energy density (40.9 μWh/cm2). Our work offers a novel and economical approach for the future production of sustainable, low-cost, and energy-efficient flexible electrode materials.