Rapid fabrication of supercapacitor electrodes using bionanoscaffolds in capillary microfluidics

[摘要] This paper reports the utilization of capillary microfluidics to rapidly create nanostructure-patterned electrodes for energy storage applications. Using patterned photoresist as open-channel capillary microfluidics, Tobacco mosaic virus (TMV) bio-nanoscaffolds suspended in solution are autonomously delivered onto planar gold electrodes over a 1 cm2area. The TMVs assemble on the electrode and form a dense bio-nanoscaffold layer due to enhanced evaporation-assisted assembly in the open-channel capillary microfluidic device within an hour. The TMV structures are coated with Ni/NiO through electroless plating and thermal oxidation to form supercapacitor electrodes. The galvanostatic charge/discharge cycle showed a 3.6-fold increase in areal capacitance for the nanostructured electrode compared to planar structures.

[发布机构] Department of Electrical and Computer Engineering, University of Maryland, College Park; MD; 20742, United States^1;Institute for Systems Research, University of Maryland, College Park; MD; 20742, United States^2;Institute for Bioscience and Biotechnology Research, Department of Plant Science and Landscape Architecture, University of Maryland, College Park; MD; 20742, United States^3

[效力级别] 能源学

[关键词] Energy storage applications;Galvanostatic charge/discharge;Micro-fluidic devices;Nano-structured electrodes;Patterned photoresists;Planar gold electrodes;Supercapacitor electrodes;Tobacco mosaic virus