He Pei, Cao Jianyun, Ding Hui, Liu Chongguang, Neilson Joseph, Li Zheling, Kinloch Ian A, Derby Brian
School of Physics and Electronics , Central South University , Changsha 410083 , Hunan , P. R. China.
School of Materials , University of Manchester , Oxford Road , Manchester M13 9PL , U.K.
ACS Appl Mater Interfaces. 2019 Sep 4;11(35):32225-32234. doi: 10.1021/acsami.9b04589. Epub 2019 Aug 21.
Conductive inks for the future printed electronics should have the following merits: high conductivity, flexibility, low cost, and compatibility with wide range of substrates. However, the state-of-the-art conductive inks based on metal nanoparticles are high in cost and poor in flexibility. Herein, we reported a highly conductive, low cost, and super flexible ink based on graphene nanoplatelets. The graphene ink has been screen-printed on plastic and paper substrates. Combined with postprinting treatments including thermal annealing and compression rolling, the printed graphene pattern shows a high conductivity of 8.81 × 10 S m and good flexibility without significant conductivity loss after 1000 bending cycles. We further demonstrate that the printed highly conductive graphene patterns can act as current collectors for supercapacitors. The supercapacitor with the printed graphene pattern as the current collector and printed activated carbon as the active material shows a good rate capability of up to 200 mV s. This work potentially provides a promising route toward the large-scale fabrication of low cost yet flexible printed electronic devices.
高导电性、柔韧性、低成本以及与多种基材的兼容性。然而，基于金属纳米颗粒的现有导电油墨成本高昂且柔韧性较差。在此，我们报道了一种基于石墨烯纳米片的高导电性、低成本且超柔韧的油墨。该石墨烯油墨已通过丝网印刷在塑料和纸质基材上。结合热退火和压缩轧制等后印刷处理，印刷的石墨烯图案显示出8.81×10 S m的高导电性，并且具有良好的柔韧性，在1000次弯曲循环后电导率无显著损失。我们进一步证明，印刷的高导电性石墨烯图案可作为超级电容器的集流体。以印刷的石墨烯图案作为集流体且印刷活性炭作为活性材料的超级电容器显示出高达200 mV s的良好倍率性能。这项工作可能为大规模制造低成本且柔性的印刷电子器件提供一条有前景的途径。
