Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University , Suzhou, Jiangsu 215123, P. R. China.
College of Physics, Optoelectronics and Energy, Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province & Key Lab of Modern Optical Technologies of Education Ministry of China, Soochow University , Suzhou, Jiangsu 215006, P. R. China.
ACS Appl Mater Interfaces. 2017 Aug 23;9(33):27649-27656. doi: 10.1021/acsami.7b06184. Epub 2017 Aug 11.
Flexible transparent solid-state supercapacitors have attracted immerse attention for the power supply of next-generation flexible "see-through" or "invisible" electronics. For fabrication of such devices, high-performance flexible transparent current collectors are highly desired. In this paper, the utilization of embedded Ag grid transparent conductive electrodes (TCEs) fabricated by a facile soft ultraviolet imprinting lithography method combined with scrap techniques, as the current collector for flexible transparent solid-state supercapacitors, is demonstrated. The embedded Ag grid TCEs exhibit not only excellent optoelectronic properties (R ∼ 2.0 Ω sq and T ∼ 89.74%) but also robust mechanical properties, which could meet the conductivity, transparency, and flexibility needs of current collectors for flexible transparent supercapacitors. The obtained supercapacitor exhibits large specific capacitance, long cycling life, high optical transparency (T ∼ 80.58% at 550 nm), high flexibility, and high stability. Owing to the embedded Ag grid TCE structure, the device shows a slight capacitance loss of 2.6% even after 1000 cycles of repetitive bending for a bending radius of up to 2.0 mm. This paves the way for developing high-performance current collectors and thus flexible transparent energy storage devices, and their general applicability opens up opportunities for flexible transparent electronics.
柔性透明固态超级电容器因其可为下一代柔性“透视”或“隐形”电子产品提供电源而受到广泛关注。为了制造这种器件，人们非常希望获得高性能的柔性透明电流收集器。本文展示了一种通过简便的软紫外压印光刻技术结合废料技术制备的嵌入式 Ag 网格透明导电电极 (TCE) 作为柔性透明固态超级电容器的电流收集器的应用。嵌入式 Ag 网格 TCE 不仅具有优异的光电性能（R∼2.0 Ω sq 和 T∼89.74%），而且具有稳健的机械性能，可满足柔性透明超级电容器电流收集器的导电性、透明度和灵活性需求。所获得的超级电容器具有大的比电容、长的循环寿命、高的光学透明度（T∼80.58%，在 550nm 处）、高的柔韧性和高的稳定性。由于采用了嵌入式 Ag 网格 TCE 结构，该器件在弯曲半径高达 2.0mm 的情况下，经过 1000 次重复弯曲后，其电容损耗仅为 2.6%。这为开发高性能电流收集器从而开发柔性透明储能器件铺平了道路，其广泛的适用性为柔性透明电子产品开辟了机会。
