Center for Nanoscale Characterization & Devices (CNCD), Wuhan National Laboratory for Optoelectronics (WNLO) & School of Physics, Huazhong University of Science and Technology (HUST) , LuoyuRoad 1037, Wuhan 430074, People's Republic of China.
School of Material Science & Engineering, Guangxi Nonferrous Metals Mineral and Materials, Collaborative Innovation Center, Guilin University of Technology , Jian'gan Road 12, Guilin, Guangxi 541004 People's Republic of China.
ACS Nano. 2017 Feb 28;11(2):2066-2074. doi: 10.1021/acsnano.6b08262. Epub 2017 Jan 25.
In large-scale applications of portable and wearable electronic devices, high-performance supercapacitors are important energy supply sources. However, since the reliability and stability of supercapacitors are generally destroyed by mechanical deformation and damage during practical applications, the stretchability and self-healability must be exploited for the supercapacitors. Preparing the highly stretchable and self-healable electrodes is still a challenge. Here, we report reduced graphene oxide fiber based springs as electrodes for stretchable and self-healable supercapacitors. The fiber springs (diameters of 295 μm) are thick enough to reconnect the broken electrodes accurately by visual inspection. By wrapping fiber springs with a self-healing polymer outer shell, a stretchable and self-healable supercapacitor is successfully realized. The supercapacitor has 82.4% capacitance retention after a large stretch (100%), and 54.2% capacitance retention after the third healing. This work gave an essential strategy for designing and fabricating stretchable and self-healable supercapacitors in next-generation multifunctional electronic devices.
在便携式和可穿戴电子设备的大规模应用中，高性能超级电容器是重要的能源供应源。然而，由于超级电容器在实际应用中通常会因机械变形和损坏而导致可靠性和稳定性受到破坏，因此必须开发超级电容器的拉伸性和自修复性。制备高拉伸和自修复的电极仍然是一个挑战。在这里，我们报告了基于还原氧化石墨烯纤维的弹簧作为用于可拉伸和自修复超级电容器的电极。纤维弹簧（直径为 295μm）足够厚，可以通过目视检查准确地重新连接断开的电极。通过用自修复聚合物外壳包裹纤维弹簧，成功实现了可拉伸和自修复超级电容器。超级电容器在经过 100%大拉伸后仍保留 82.4%的电容，第三次修复后仍保留 54.2%的电容。这项工作为设计和制造下一代多功能电子设备中的可拉伸和自修复超级电容器提供了重要策略。
