Pillar of Engineering Product Development, Singapore University of Technology and Design, 20 Dover Drive, 138682, Singapore.
Nanotechnology. 2014 Mar 7;25(9):094010. doi: 10.1088/0957-4484/25/9/094010. Epub 2014 Feb 12.
A novel method for fabricating all-solid flexible microsupercapacitors (MSCs) was proposed and developed by utilizing screen printing technology. A typical printed MSC is composed of a printed Ag electrode, MnO2/onion-like carbon (MnO2/OLC) as active material and a polyvinyl alcohol:H3PO4 (PVA:H3PO4) as solid electrolyte. A capacity of 7.04 mF cm(-2) was achieved for the screen printed MnO2/OLC MSCs at a current density of 20 μA cm(-2). It also showed an excellent cycling stability, with 80% retention of the specific capacity after 1000 cycles. The printed all-solid flexible MSCs exhibited remarkably high mechanical flexibility when the devices were bent to a radius of 3.5 mm. In addition, all-solid MSCs were successfully demonstrated by screen printing technique on various substrates, such as silicon, glass and conventional printing paper. Moreover, the screen printing technique can be extended to other active materials, such as OLC and carbon nanotubes. This method provides a general route for printable all-solid flexible MSCs, which is compatible with the roll-to-roll process for various high performance active materials.
提出并发展了一种利用丝网印刷技术制备全固态柔性微超级电容器（MSC）的新方法。典型的印刷 MSC 由印刷的 Ag 电极、MnO2/洋葱状碳（MnO2/OLC）作为活性材料和聚乙烯醇：H3PO4（PVA:H3PO4）作为固态电解质组成。在 20 μA cm(-2)的电流密度下，丝网印刷的 MnO2/OLC MSC 的容量达到了 7.04 mF cm(-2)。它还表现出优异的循环稳定性，在 1000 次循环后，比容量保持了 80%。当器件弯曲到 3.5 毫米的半径时，印刷的全固态柔性 MSC 表现出极高的机械柔韧性。此外，通过丝网印刷技术，全固态 MSC 已成功地在各种基底上进行了演示，如硅、玻璃和常规印刷纸。此外，丝网印刷技术可以扩展到其他活性材料，如 OLC 和碳纳米管。该方法为可印刷的全固态柔性 MSC 提供了一种通用途径，与各种高性能活性材料的卷对卷工艺兼容。
