Highly Stretchable Waterproof Fiber Asymmetric Supercapacitors in an Integrated Structure
Highly Stretchable Waterproof Fiber Asymmetric Supercapacitors in an Integrated Structure
复制标题
一体化结构的高拉伸防水纤维不对称超级电容器
DOI：
10.1021/acsami.8b05676
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发表时间：
2018-06-13
影响因子：
9.5
通讯作者：
Yu, Neng
中科院分区：
文献类型：
--
作者：
Guo, Kai;Wang, Xianfu;Yu, Neng
纤维超级电容器作为下一代可穿戴电子产品的有前途的电源候选者引起了极大的关注，这些电子产品具有柔性，可拉伸和可清洗性。虽然已经实现了具有高能量密度的非对称纤维超级电容器，但其拉伸性不超过200%，并且仍然面临机械不稳定和不可靠的防水结构。这项工作开发了一种高度集成的结构，用于防水，高度可拉伸和不对称的纤维状超级电容器，其通过将螺旋形不对称纤维超级电容器集成到双功能聚合物中来组装。该非对称纤维超级电容器的工作电压为1.6 V，能量密度为2.86 mW h/cm（3），在水中浸泡50 h后电容量保持不变，在400%的最大应变下拉伸-释放3000次后，电容量仍保持初始值的95%。非凡的防水能力、大的拉伸应变和优异的拉伸稳定性归功于高度集成的结构设计，这也可以简化可拉伸防水纤维超级电容器的组装过程。
Fiber supercapacitors have attracted tremendous attention as promising power source candidates for the next generation of wearable electronics, which are flexible, stretchable, and washable. Although asymmetric fiber supercapacitors with a high energy density have been achieved, their stretchability is no more than 200%, and they still face mechanical instability and an unreliable waterproof structure. This work develops a highly integrated structure for a waterproof, highly stretchable, and asymmetric fiber-shaped supercapacitor, which is assembled by integrating a helixshaped asymmetric fiber supercapacitor into a bifunctional polymer. The asymmetric fiber supercapacitor demonstrates a working voltage of 1.6 V, a high energy density of 2.86 mW h/cm(3), has unchanged capacitance after being immersed in water for 50 h, and retains 95% of its initial capacitance after 3000 cycles of stretching-releasing at a maximum strain of 400%. The extraordinary waterproof capability, the large stretching strain, and excellent stretching stability are attributed to the highly integrated structure design, which can also simplify the assembly process of stretchable, waterproof fiber supercapacitors.