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

Chuanfang (John) Zhang (), Lorcan McKeon, Matthias P. Kremer, Sang-Hoon Park, Oskar Ronan, Andrés Seral‐Ascaso, Sebastian Barwich, Cormac Ó Coileáin, Niall McEvoy, Hannah C. Nerl, Babak Anasori, Jonathan N. Coleman, Yury Gogotsi () and Valeria Nicolosi ()
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Chuanfang (John) Zhang: Trinity College Dublin
Lorcan McKeon: Trinity College Dublin
Matthias P. Kremer: Trinity College Dublin
Sang-Hoon Park: Trinity College Dublin
Oskar Ronan: Trinity College Dublin
Andrés Seral‐Ascaso: Trinity College Dublin
Sebastian Barwich: Trinity College Dublin
Cormac Ó Coileáin: Trinity College Dublin
Niall McEvoy: Trinity College Dublin
Hannah C. Nerl: Trinity College Dublin
Babak Anasori: Drexel University
Jonathan N. Coleman: Trinity College Dublin
Yury Gogotsi: Drexel University
Valeria Nicolosi: Trinity College Dublin

Nature Communications, 2019, vol. 10, issue 1, 1-9

Abstract: 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.

Date: 2019
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DOI: 10.1038/s41467-019-09398-1

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