Liu Libin, Yu You, Yan Casey, Li Kan, Zheng Zijian
1] Nanotechnology Center, Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China [2] Shandong Provincial Key Laboratory of Fine Chemicals, Key Laboratory of Fine Chemicals in Universities of Shandong, Qilu University of Technology, Jinan 250353, China.
1] Nanotechnology Center, Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China [2] Advanced Research Centre for Fashion and Textiles, The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen 518000, China.
Nat Commun. 2015 Jun 11;6:7260. doi: 10.1038/ncomms8260.
One-dimensional flexible supercapacitor yarns are of considerable interest for future wearable electronics. The bottleneck in this field is how to develop devices of high energy and power density, by using economically viable materials and scalable fabrication technologies. Here we report a hierarchical graphene-metallic textile composite electrode concept to address this challenge. The hierarchical composite electrodes consist of low-cost graphene sheets immobilized on the surface of Ni-coated cotton yarns, which are fabricated by highly scalable electroless deposition of Ni and electrochemical deposition of graphene on commercial cotton yarns. Remarkably, the volumetric energy density and power density of the all solid-state supercapacitor yarn made of one pair of these composite electrodes are 6.1 mWh cm(-3) and 1,400 mW cm(-3), respectively. In addition, this SC yarn is lightweight, highly flexible, strong, durable in life cycle and bending fatigue tests, and integratable into various wearable electronic devices.
一维柔性超级电容器纱线对于未来的可穿戴电子产品具有相当大的吸引力。该领域的瓶颈在于如何使用经济可行的材料和可扩展的制造技术来开发具有高能量和功率密度的器件。在此，我们报告一种分级石墨烯-金属纺织复合电极概念以应对这一挑战。分级复合电极由固定在镀镍棉纱表面的低成本石墨烯片组成，这些电极是通过在商业棉纱上进行高度可扩展的镍化学沉积和石墨烯电化学沉积制备而成。值得注意的是，由一对这些复合电极制成的全固态超级电容器纱线的体积能量密度和功率密度分别为6.1 mWh cm(-3)和1400 mW cm(-3)。此外，这种超级电容器纱线重量轻、柔韧性高、强度大、在生命周期和弯曲疲劳测试中耐用，并且可集成到各种可穿戴电子设备中。
