25February2020

Nano-Micro Letters

Drying-Mediated Self-Assembly of Graphene for Inkjet Printing of High-Rate Microsupercapacitors

Szymon Sollami Delekta1, Mika-Matti Laurila2, Matti Mäntysalo2, *, Jiantong Li1, 2, *

Abstract | Support Info
icon-htmlFull Text Html
icon-pdf-smPDF w/ Links
icon-citExport Citation
Figures
+Show more

Nano-Micro Lett. (2020) 12: 40

First Online: 27 January 2020 (Article)

DOI:10.1007/s40820-020-0368-8

*Corresponding author. E-mail: matti.mantysalo@tuni.fi (Matti Mäntysalo); jiantong@kth.se (Jiantong Li)

 

Abstract

 


Toc

Scalable fabrication of high-rate microsupercapacitors (MSCs) is highly desired for on-chip integration of energy storage components. By virtue of the special self-assembly behavior of 2D materials during drying thin films of their liquid dispersion, a new inkjet printing technique of passivated graphene micro-flakes is developed to directly print MSCs with 3D-networked porous microstructure. The presence of macroscale through-thickness pores provides fast ion transport pathways and improves the rate capability of the devices even with solid-state electrolytes. During multiple-pass printing, the porous microstructure effectively absorbs the successively printed inks, allowing full printing of 3D-structured MSCs comprising multiple vertically stacked cycles of current collectors, electrodes, and sold-state electrolytes. The all-solid-state heterogeneous 3D MSCs exhibit excellent vertical scalability and high areal energy density and power density, evidently outperforming the MSCs fabricated through general printing techniques.


 

Keywords

High-rate microsupercapacitor; 3D microsupercapacitor; Drying-mediated self-assembly; Graphene; Inkjet printing

 View: Full Text HTML | PDF w/ Links