Laboratory of Fiber Materials and Modern Textile, the Growing Base for State Key Laboratory, Qingdao University , 308 Ningxia Road, Qingdao 266071, People's Republic of China.
ACS Nano. 2013 Nov 26;7(11):10225-32. doi: 10.1021/nn404533r. Epub 2013 Oct 30.
Tailoring the structure and properties of graphene fibers is an important step toward practical applications. Here, we report macroscopic, long graphene ribbons formed by combining electrostatic interaction and shear stress during the wet-spinning process. The graphene ribbons are flexible and can be woven into complex structures, and the ribbon morphology can be tailored by controlling the orientation of wrinkles to obtain elasticity within a modest strain. We demonstrate several potential applications of pure or Pt-graphene hybrid ribbons as elastic strain sensors, counter electrodes for dye-sensitized fiber solar cells with cell efficiencies reaching 4.69% under standard illumination and 6.41% with a back reflector, and woven fabric supercapacitor electrodes. Our method can directly fabricate meter-long graphene ribbons with controlled structure and high performance as both energy conversion and energy storage materials.
对石墨烯纤维的结构和性能进行调整是实现其实际应用的重要步骤。在这里，我们通过在湿法纺丝过程中结合静电相互作用和剪切应力，报告了宏观的、长的石墨烯带状物的形成。石墨烯带具有柔韧性，可以编织成复杂的结构，并且可以通过控制褶皱的取向来调整带状物的形态，以在适度的应变下获得弹性。我们展示了纯或 Pt-石墨烯混合带状物作为弹性应变传感器、染料敏化纤维太阳能电池的对电极的几种潜在应用，在标准照明下电池效率达到 4.69%，使用背面反射器时达到 6.41%，以及编织织物超级电容器电极。我们的方法可以直接制造具有可控结构和高性能的米级石墨烯带状物，作为能量转换和储能材料。
