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Asymmetric fabric supercapacitor with a high areal energy density and excellent flexibility

机译:具有高面能量密度和出色柔韧性的非对称织物超级电容器

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Currently, there still remains a big challenge for flexible supercapacitors: low energy density. According to the equation E = (1/2)CU2, here we realize a combination of high gravimetric specific capacitances of active materials, high mass loadings of active materials and a large voltage window, which results in the highest areal energy density to the best of our knowledge. Specifically, a cotton fabric was tuned to have an optimal pore structure, on which CNT/rGO and PPy were coated by dip-coating and chemical polymerization, respectively. The mass loading of CNT/rGO is up to 7.7 mg cm?2, to balance which the PPy has a mass loading of 5.7 mg cm?2. The resulting asymmetric supercapacitor with a voltage window of 1.8 V exhibits a super-high areal energy density of 0.26 mW h cm?2. Moreover, it possesses excellent stability under charge/discharge for 1000 cycles and under bending 100 times with an angle of 180°.
机译:当前,柔性超级电容器仍然面临着巨大的挑战:低能量密度。根据等式 E =(1/2) CU 2 ,在这里我们实现了高重量的组合活性材料的比电容,活性材料的大量负载和较大的电压窗口,据我们所知,这导致了最高的面能量密度。具体地,调整棉织物以使其具有最佳的孔结构,在其上分别通过浸涂和化学聚合来涂覆CNT / rGO和PPy。 CNT / rGO的质量负载高达7.7 mg cm ?2 ,以平衡PPy的质量负载为5.7 mg cm ? 2 。所得的电压窗口为1.8 V的非对称超级电容器表现出0.26 mW h cm ?2 的超高面能密度。此外,它在1000次充电/放电和以180°角弯曲100次后具有出色的稳定性。

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