Division of Nanomaterials and Chemistry, Hefei National Research Center for Physical Sciences at the Microscale, Collaborative Innovation Center of Suzhou Nano Science and Technology, Department of Chemistry, CAS Center for Excellence in Nanoscience, Hefei Science Center of CAS, University of Science and Technology of China, Hefei, 230026, China.
Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, 230009, China.
Adv Mater. 2018 Apr;30(15):e1706435. doi: 10.1002/adma.201706435. Epub 2018 Feb 27.
Graphene-based fibers (GBFs) are attractive for next-generation wearable electronics due to their potentially high mechanical strength, superior flexibility, and excellent electrical and thermal conductivity. Many efforts have been devoted to improving these properties of GBFs in the past few years. However, fabricating GBFs with high strength and electrical conductivity simultaneously remains as a great challenge. Herein, inspired by nacre-like multilevel structural design, an interface-reinforced method is developed to improve both the mechanical property and electrical conductivity of the GBFs by introducing polydopamine-derived N-doped carbon species as resistance enhancers, binding agents, and conductive connection "bridges." Remarkably, both the tensile strength and electrical conductivity of the obtained GBFs are significantly improved to ≈724 MPa and ≈6.6 × 10 S m , respectively, demonstrating great superiority compared to previously reported similar GBFs. These outstanding integrated performances of the GBFs provide it with great application potential in the fields of flexible and wearable microdevices such as sensors, actuators, supercapacitors, and batteries.
基于石墨烯的纤维（GBFs）由于其潜在的高强度、卓越的柔韧性以及优异的导电性和导热性，在下一代可穿戴电子产品中具有吸引力。在过去的几年中，人们已经投入了大量的精力来改善 GBFs 的这些性能。然而，同时制造具有高强度和高导电性的 GBFs 仍然是一个巨大的挑战。受珍珠层状多级结构设计的启发，本文提出了一种界面增强的方法，通过引入多巴胺衍生的 N 掺杂碳物种作为增强阻力、结合剂和导电连接“桥梁”，来提高 GBFs 的机械性能和导电性。值得注意的是，所得到的 GBFs 的拉伸强度和电导率分别显著提高到约 724 MPa 和 6.6×10 S m ，与之前报道的类似 GBFs 相比具有很大的优势。GBFs 的这些出色的综合性能为其在传感器、执行器、超级电容器和电池等柔性和可穿戴微电子器件领域的应用提供了巨大的潜力。
