Fig. 3 | Nature Communications

Fig. 3

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

Fig. 3

Inkjet printing of MXene organic inks. a Optical images of inkjet-printed “MXene” word (top), “Direct MXene Ink Printing” word (middle) and MSCs (bottom) supported on AlOx-coated PET. A total of 20 MSCs with different combinations and 80 letters were printed as a demonstration, indicating a high reproducibility of the inkjet printing. Scale bar = 1 cm. b Multiple peeling tests of an inkjet-printed MSC (inset) using scotch tape. No material is stuck to the tape after ten peels, indicating a strong adhesion between the printed lines and the AlOx-coated PET substrate. c AFM image of the inkjet-printed line, showing a homogenous surface consisting of interconnected nanosheets. Scale bar = 10 µm. d The height profiles of inkjet-printed lines with different number of paths, <N>. e The line thickness plotted as a function of <N>. The lines in (d) and (e) were printed using NMP ink with a concentration of 12.5 mg mL−1. f The sheet resistance, Rs, plotted as a function of <N>. Inset shows the optical images of various printed lines (2 cm in length) with different <N>. g The electronic conductivity changes as a function of bending degree (top) and number of bending cycles (bottom). One cycle is defined as bending the printed line to 150° then releasing to 0° (flat). h I–V curves of lines with different <N>. i Resistance of the printed lines with different <N> plotted as a function of length (left). An excellent linearity is observed in all the as-printed lines. The right panel shows resistance of lines with <N> = 1 using NMP ink, indicating a line resistivity of 620 kΩ µm−1 and 26 MΩ µm−1 achieved in the inks diluted by 20 times (~0.63 mg mL−1, bottom right) and 100 times (~0.13 mg mL−1, top right), respectively

Back to article page