Zhang Jizhen, Seyedin Shayan, Qin Si, Wang Zhiyu, Moradi Sepehr, Yang Fangli, Lynch Peter A, Yang Wenrong, Liu Jingquan, Wang Xungai, Razal Joselito M
Institute for Frontier Materials, Deakin University, Geelong, VIC, 3216, Australia.
School of Life and Environmental Sciences, Deakin University, Geelong, VIC, 3216, Australia.
Small. 2019 Feb;15(8):e1804732. doi: 10.1002/smll.201804732. Epub 2019 Jan 17.
Fiber-shaped supercapacitors (FSCs) are promising energy storage solutions for powering miniaturized or wearable electronics. However, the scalable fabrication of fiber electrodes with high electrical conductivity and excellent energy storage performance for use in FSCs remains a challenge. Here, an easily scalable one-step wet-spinning approach is reported to fabricate highly conductive fibers using hybrid formulations of Ti C T MXene nanosheets and poly(3,4-ethylenedioxythiophene):polystyrene sulfonate. This approach produces fibers with a record conductivity of ≈1489 S cm , which is about five times higher than other reported Ti C T MXene-based fibers (up to ≈290 S cm ). The hybrid fiber at ≈70 wt% MXene shows a high volumetric capacitance (≈614.5 F cm at 5 mV s ) and an excellent rate performance (≈375.2 F cm at 1000 mV s ). When assembled into a free-standing FSC, the energy and power densities of the device reach ≈7.13 Wh cm and ≈8249 mW cm , respectively. The excellent strength and flexibility of the hybrid fibers allow them to be wrapped on a silicone elastomer fiber to achieve an elastic FSC with 96% capacitance retention when cyclically stretched to 100% strain. This work demonstrates the potential of MXene-based fiber electrodes and their scalable production for fiber-based energy storage applications.
纤维状超级电容器（FSCs）是为小型化或可穿戴电子产品供电的很有前景的储能解决方案。然而，用于FSCs的具有高电导率和优异储能性能的纤维电极的可扩展制造仍然是一个挑战。在此，报道了一种易于扩展的一步湿法纺丝方法，使用Ti C T MXene纳米片和聚（3,4-乙撑二氧噻吩）：聚苯乙烯磺酸盐的混合配方来制造高导电纤维。这种方法生产的纤维具有创纪录的电导率，约为1489 S cm ，比其他报道的基于Ti C T MXene的纤维（高达约290 S cm ）高约五倍。约70 wt% MXene的混合纤维在5 mV s 时显示出高体积电容（约614.5 F cm5 F cm ）和优异的倍率性能（在1000 mV s 时约为375.2 F cm ）。当组装成独立的FSC时，该器件的能量密度和功率密度分别达到约7.13 Wh cm 和约8249 mW cm 。混合纤维优异的强度和柔韧性使它们能够包裹在硅橡胶纤维上，以实现当循环拉伸至100%应变时电容保持率为96%的弹性FSC。这项工作展示了基于MXene的纤维电极的潜力及其在基于纤维的储能应用中的可扩展生产。的强度和柔韧性使它们能够包裹在硅橡胶纤维上，以实现弹性FSC，当循环拉伸至100%应变时，其电容保持率为96%。这项工作展示了基于MXene的纤维电极的潜力及其在基于纤维的储能应用中的可扩展生产。
