A High Performance Stretchable Asymmetric Fiber‐Shaped Supercapacitor with a Core‐Sheath Helical Structure,Advanced Energy Materials

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A High Performance Stretchable Asymmetric Fiber‐Shaped Supercapacitor with a Core‐Sheath Helical Structure
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2016-10-12 , DOI: 10.1002/aenm.201600976
Jiali Yu _{1,

2} , Weibang Lu ₃ , Joseph P. Smith ₄ , Karl S. Booksh ₄ , Linghui Meng ₁ , Yudong Huang ₁ , Qingwen Li ₃ , Joon-Hyung Byun ₅ , Youngseok Oh ₅ , Yushan Yan ₆ , Tsu-Wei Chou ₂

Affiliation

The emerging fiber‐shaped supercapacitors (FSSs) have motivated tremendous research interest in energy storage devices. However, challenges still exist in the pursuit of combination of excellent electrochemical performance and mechanical stretchability. Here, a core‐sheath asymmetric FSS is first made by wrapping gel electrolyte coated carbon nanotube (CNT)@MnO₂ core fiber with CNT@PPy composite film. Then a stretchable helical structure is formed by over‐twisting the FSS. The resulted stretchable asymmetric FSS exhibits a specific capacitance of 60.435 mF cm⁻² at the scan rate of 10 mV s⁻¹ and the capacitance performance is well maintained during repeated stretching to 20% strain. Furthermore, a high energy density of 18.88 μW h cm⁻² is achieved for the stretchable FSS due to its high specific capacitance and extended potential window of 1.5 V.

中文翻译：

具有芯鞘螺旋结构的高性能可拉伸不对称纤维形超级电容器

新兴的纤维状超级电容器（FSS）激发了对储能设备的巨大研究兴趣。然而，在追求优异的电化学性能和机械拉伸性的组合方面仍然存在挑战。在此，首先通过将涂有凝胶电解质的碳纳米管（CNT）@MnO ₂芯纤维与CNT @ PPy复合膜包裹在一起，制成芯鞘非对称FSS 。然后，通过过度缠绕FSS形成可拉伸的螺旋结构。所得的可拉伸的不对称FSS在10mV s ^-1的扫描速率下显示出60.435mF cm ^-2的比电容，并且在重复拉伸至20％应变期间良好地保持了电容性能。此外，具有18.88μWh cm ^-2的高能量密度由于其高的比电容和1.5 V的扩展电势窗口，因此可拉伸FSS达到了5％的可扩展性。

更新日期：2016-10-12

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