Wang Zhiyu, Qin Si, Seyedin Shayan, Zhang Jizhen, Wang Jiangting, Levitt Ariana, Li Na, Haines Carter, Ovalle-Robles Raquel, Lei Weiwei, Gogotsi Yury, Baughman Ray H, Razal Joselito M
Institute for Frontier Materials, Deakin University, Geelong Waurn Ponds Campus, Geelong, Victoria, 3216, Australia.
Department of Materials Science and Engineering and A. J. Drexel Nanomaterials Institute, Drexel University, Philadelphia, PA, 19104, USA.
Small. 2018 Sep;14(37):e1802225. doi: 10.1002/smll.201802225. Epub 2018 Aug 7.
Yarn-shaped supercapacitors (YSCs) once integrated into fabrics provide promising energy storage solutions to the increasing demand of wearable and portable electronics. In such device format, however, it is a challenge to achieve outstanding electrochemical performance without compromising flexibility. Here, MXene-based YSCs that exhibit both flexibility and superior energy storage performance by employing a biscrolling approach to create flexible yarns from highly delaminated and pseudocapacitive MXene sheets that are trapped within helical yarn corridors are reported. With specific capacitance and energy and power densities values exceeding those reported for any YSCs, this work illustrates that biscrolled MXene yarns can potentially provide the conformal energy solution for powering electronics beyond just the form factor of flexible YSCs.
纱线状超级电容器（YSCs）一旦集成到织物中，就能为可穿戴和便携式电子产品不断增长的需求提供很有前景的能量存储解决方案。然而，在这种器件形式中，要在不损害柔韧性的情况下实现出色的电化学性能是一项挑战。在此，报道了一种基于MXene的YSCs，通过采用双卷曲方法，由高度分层且具有赝电容的MXene片材形成被困在螺旋纱线通道内的柔性纱线，从而兼具柔韧性和卓越的能量存储性能。该工作中特定电容、能量和功率密度值超过了任何已报道的YSCs，表明双卷曲MXene纱线不仅能在柔性YSCs的外形因素之外，还可能为电子设备供电提供贴合的能量解决方案。
