Rapid fabrication of supercapacitor electrodes using bionanoscaffolds in capillary microfluidics

15th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications

物理学;能源学

Zang, F.^1,2 ; Chu, S.^1,2 ; Gerasopoulos, K.^2 ; Culver, J.N.^3 ; Ghodssi, R.^1,2

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

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;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/660/1/012010/pdf
DOI  :  10.1088/1742-6596/660/1/012010

来源: IOP

【 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.