Bio-nanotextured high aspect ratio micropillar arrays for high surface area energy storage devices

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

物理学;能源学

Chu, S.^1,2 ; Gerasopoulos, K.^2 ; 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

关键词: Charge/discharge cycle;    Electrochemical characterizations;    Electrode structure;    Fabrication and characterizations;    Hierarchical structures;    Nickel oxides (NiO);    Supercapacitor electrodes;    Tobacco mosaic virus;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/660/1/012046/pdf
DOI  :  10.1088/1742-6596/660/1/012046

来源: IOP

【 摘 要 】

This paper presents fabrication and characterization of bio-nanotextured hierarchical nickel oxide (NiO) supercapacitor electrodes. The hierarchical electrode structure is created through self-assembly of Tobacco mosaic viruses (TMVs) on high aspect-ratio micropillar arrays. Enhanced assembly of the bio-nanoparticles was achieved by increasing TMV solution accessibility into the deep microcavities of the pillar arrays. Electrochemical characterization of the hierarchical NiO supercapacitor electrodes revealed a 25-fold increase in charge capacity compared to a planar NiO, and demonstrated excellent cycle stability over 1500 charge/discharge cycles at 2 mA/cm2. This study leverages the unique bio-nanoscaffolds for small scale energy storage devices through further optimization of the hierarchical structures and wetting techniques for significant improvements in micro/nano scale energy storage devices.