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首页> 外文期刊>Advanced Functional Materials >Ultrahigh-Strength Ultrahigh Molecular Weight Polyethylene (UHMWPE)-Based Fiber Electrode for High Performance Flexible Supercapacitors
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Ultrahigh-Strength Ultrahigh Molecular Weight Polyethylene (UHMWPE)-Based Fiber Electrode for High Performance Flexible Supercapacitors

机译：高性能柔性超级电容器用超高强度超高分子量聚乙烯（UHMWPE）基纤维电极

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摘要

Flexible fiber-based supercapacitor (FSC) with excellent electrochemical performance and high tensile strength and modulus is strongly desired for some special circumstances, such as load-bearing, abrasion resistant, and anticutting fabrics. Here, a series of ultrahigh-strength fiber electrodes are prepared for flexible FSCs based on ultrahigh molecular weight polyethylene fibers, on which the polydopamine, Ag, and poly (3,4-ethylene dioxythiophene): poly(styrenesulfonate) are deposited in sequence. The modified fiber-based electrode exhibits superhigh strength up to 3.72 GPa, which is the highest among fiber-based electrodes reported to date. In addition, FSCs fabricated with the optimized fiber electrode shows a specific areal capacity as high as 563 mF cm(-2) at 0.17 mA cm(-2), which corresponds to a high areal energy density of approximate to 50.1 mu Wh cm(-2) at a power density of approximate to 124 mu W cm(-2). The specific areal capacity only decrease 8% after 1000 times bending test, indicating the outstanding bending performance of this composite fiber electrode. Furthermore, several FSCs can be connected in series or in parallel to get higher working voltage or higher capacity respectively, which demonstrates its potential for broad applications in flexible devices.
机译：在某些特殊情况下（例如承重，耐磨性和抗切割织物），强烈需要具有优异的电化学性能，高拉伸强度和模量的柔性纤维基超级电容器（FSC）。在此，基于超高分子量聚乙烯纤维制备了一系列用于柔性FSC的超高强度纤维电极，在其上依次沉积了聚多巴胺，Ag和聚（3,4-乙撑二氧噻吩）：聚（苯乙烯磺酸盐）。改性的基于纤维的电极表现出高达3.72 GPa的超高强度，这是迄今为止报道的基于纤维的电极中最高的。此外，用优化的纤维电极制造的FSC在0.17 mA cm（-2）时显示的比表面积高达563 mF cm（-2），这对应于约50.1μWh·cm（ -2）的功率密度约为124μW cm（-2）。在经过1000次弯曲试验后，比表面积仅下降8％，表明该复合纤维电极具有出色的弯曲性能。此外，几个FSC可以串联或并联连接以分别获得更高的工作电压或更高的容量，这证明了其在柔性设备中的广泛应用的潜力。

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