Department of Mechanical Engineering, University of Michigan-Dearborn , Dearborn, Michigan 48128, United States.
ACS Appl Mater Interfaces. 2017 Feb 8;9(5):4597-4604. doi: 10.1021/acsami.6b13904. Epub 2017 Jan 30.
A novel 3D printing procedure is presented for fabricating carbon-nanotubes (CNTs)-based microsupercapacitors. The 3D printer uses a CNTs ink slurry with a moderate solid content and prints a stream of continuous droplets. Appropriate control of a heated base is applied to facilitate the solvent removal and adhesion between printed layers and to improve the structure integrity without structure delamination or distortion upon drying. The 3D-printed electrodes for microsupercapacitors are characterized by SEM, laser scanning confocal microscope, and step profiler. Effect of process parameters on 3D printing is also studied. The final solid-state microsupercapacitors are assembled with the printed multilayer CNTs structures and poly(vinyl alcohol)-HPO gel as the interdigitated microelectrodes and electrolyte. The electrochemical performance of 3D printed microsupercapacitors is also tested, showing a significant areal capacitance and excellent cycle stability.
提出了一种新颖的 3D 打印工艺，用于制造基于碳纳米管（CNT）的微超级电容器。该 3D 打印机使用具有中等固含量的 CNT 油墨浆料，并打印连续的液滴流。适当控制加热底座有助于去除溶剂以及改善打印层之间的附着力，并提高结构完整性，而不会在干燥过程中分层或变形。微超级电容器的 3D 打印电极通过 SEM、激光扫描共聚焦显微镜和台阶轮廓仪进行表征。还研究了工艺参数对 3D 打印的影响。最终的固态微超级电容器由多层 CNT 结构和聚（乙烯醇）-HPO 凝胶组装而成，作为互穿微电极和电解质。还测试了 3D 打印微超级电容器的电化学性能，表现出显著的面电容和优异的循环稳定性。
