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Quasi-solid-state highly stretchable circular knitted MnO2@CNT supercapacitor

机译：准固态高度可伸展的圆形针织MnO2 @ CNT超级电容器

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摘要

Flexible and stretchable fiber supercapacitors have been progressively improved for wearable electronic devices. However, they should be further improved with respect to stretchable range and stable electrochemical performance during dynamic movement when considering the tensile range for wearable applications. Here, we report a quasi-solid-state circular knitted MnO _(2) @CNT supercapacitor with high tensile range. To fabricate this, CNT fibers were knitted into a circular shape using a knitting machine then subsequently electrochemically deposited by a pseudocapacitive material, MnO _(2) . Consequently, the knitted MnO _(2) @CNT fiber supercapacitors were structurally 100% stretchable, and their energy storage performance remained stable during knitted capacitor stretching of up to 100%. Maximum linear capacitance and area capacitance are considerably large (321.08 mF cm ~(?1) , 511.28 mF cm ~(?2) ). In addition, the supercapacitor showed negligible loss of capacitance after 10?000 repeated charge/discharge cycles and dynamic stretching cycle testing. Furthermore, we also provided double-walled knitted MnO _(2) @CNT supercapacitors by symmetrically inserting one knitted supercapacitor into another. The double-walled supercapacitor also exhibited a stable stretchability of up to 100% without loss of capacitance. Therefore, this highly stretchable fiber-type supercapacitor could be utilized for energy storage in wearable devices.
机译：可穿戴电子设备逐步改善柔性且可伸缩的纤维超级电容器。然而，在考虑可穿戴应用的拉伸范围时，应在动态运动期间相对于可拉伸范围和稳定的电化学性能进一步改善它们。在这里，我们报告了具有高拉伸范围的准固态圆形针织MNO _（2）@CNT超级电容器。为了制造这一点，使用针织机针织成圆形的CNT纤维然后通过假偶联材料，MNO _（2）电化学沉积。因此，编织的MNO _（2）@cnt纤维超级电容器在结构上拉伸，其能量储存性能在针织电容器中保持稳定，高达100％。最大线性电容和面积电容相当大（321.08mF cm〜（α1），511.28mF cm〜（？2））。此外，超级电容器在10 000重复充电/放电循环和动态拉伸循环测试之后可以忽略不计的电容损失。此外，我们还通过对称插入另一个针织的超级电容器来提供双壁针织MnO _（2）@CNT超级电容器。双壁超级电容器还表现出稳定的拉伸性，高达100％而不会损失电容。因此，这种高度可拉伸的光纤型超级电容器可用于可穿戴设备中的储能。

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