Highly\nTransparent and Flexible All-Solid-State Supercapacitors\nBased on Ultralong Silver Nanowire Conductive Networks

Abstract

Ultralong\nsilver nanowires (Ag NWs) are preferred for enabling\ntransparent conductive networks with low sheet resistance, high transparency,\nand excellent mechanical flexibility, which offer great merits in\nachieving high-performance and flexible energy storage devices. Herein,\na new type of polyol process was proposed for the synthesis of ultralong\nAg NWs. Uniform Ag NWs with the average length of 75 μm were\nobtained. Transparent conductive films (TCFs) based on the as-prepared\nAg NWs exhibited low sheet resistance of 15.2 Ω/sq at 84% transmittance\nwith a negligible change in sheet resistance after bending. Flexible\nall-solid-state supercapacitors based on the resulting Ag NW TCFs\nshowed high transparency (>50%), good mechanical flexibility, and\nhigh cyclic stability with only slight areal capacitance decays after\n100 times of bending (∼25%) and 5000 charge–discharge\ncycles (∼15%). The results manifest great potentials of the\nresulting TCFs based on ultralong Ag NWs for flexible and wearable\nenergy-storage applications.