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Nat Commun. 2019 Apr 17;10(1):1795. doi: 10.1038/s41467-019-09398-1.

Additive-free MXene inks and direct printing of micro-supercapacitors.

Author information

1
CRANN and AMBER Research Centers, Trinity College Dublin, Dublin 2, Ireland. zhangjc@tcd.ie.
2
School of Chemistry, Trinity College Dublin, Dublin 2, Ireland. zhangjc@tcd.ie.
3
CRANN and AMBER Research Centers, Trinity College Dublin, Dublin 2, Ireland.
4
School of Physics, Trinity College Dublin, Dublin 2, Ireland.
5
School of Chemistry, Trinity College Dublin, Dublin 2, Ireland.
6
I-FORM Advanced Manufacturing Research Centre, Trinity College Dublin, Dublin 2, Ireland.
7
A.J. Drexel Nanomaterials Institute and Department of Materials Science and Engineering, Drexel University, Philadelphia, PA, 19104, USA.
8
A.J. Drexel Nanomaterials Institute and Department of Materials Science and Engineering, Drexel University, Philadelphia, PA, 19104, USA. gogotsi@drexel.edu.
9
CRANN and AMBER Research Centers, Trinity College Dublin, Dublin 2, Ireland. nicolov@tcd.ie.
10
School of Chemistry, Trinity College Dublin, Dublin 2, Ireland. nicolov@tcd.ie.
11
I-FORM Advanced Manufacturing Research Centre, Trinity College Dublin, Dublin 2, Ireland. nicolov@tcd.ie.

Abstract

Direct printing of functional inks is critical for applications in diverse areas including electrochemical energy storage, smart electronics and healthcare. However, the available printable ink formulations are far from ideal. Either surfactants/additives are typically involved or the ink concentration is low, which add complexity to the manufacturing and compromises the printing resolution. Here, we demonstrate two types of two-dimensional titanium carbide (Ti3C2Tx) MXene inks, aqueous and organic in the absence of any additive or binary-solvent systems, for extrusion printing and inkjet printing, respectively. We show examples of all-MXene-printed structures, such as micro-supercapacitors, conductive tracks and ohmic resistors on untreated plastic and paper substrates, with high printing resolution and spatial uniformity. The volumetric capacitance and energy density of the all-MXene-printed micro-supercapacitors are orders of magnitude greater than existing inkjet/extrusion-printed active materials. The versatile direct-ink-printing technique highlights the promise of additive-free MXene inks for scalable fabrication of easy-to-integrate components of printable electronics.

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