University of Cambridge > > Department of Materials Science & Metallurgy Seminar Series > Synthesis and assembly of atomically thin TMDs for energy conversion and energy storage

Synthesis and assembly of atomically thin TMDs for energy conversion and energy storage

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Miniaturization over three-dimensions is very attractive for future on-chip technologies where device efficiencies need to be optimized over small areas. This is a new challenge, as device miniaturization has been focused to achieve planar-geometries primarily. Direct-ink-writing (or robocasting), is an additive manufacturing technique that brings the possibility of fabricating architectures with programmable design in the three-dimensions (3D) at different length scales. In this seminar, I will talk about our work on 3D printed electrodes for microsupercapacitors from water-based 2D atomically thin material inks and our synthesis approaches to the 2D layers. The materials of choice are transition metal dichalcogenides (TMDs), which are attracting a considerable interest owing to their multiple functionalities. The inks are composed by highly concentrated atomically thin sheets of TMDs, either exfoliated from bulk powders or obtained via direct synthesis in solution. By tailoring the rheology of our formulated inks, printability has been achieved along with mechanical robustness of the printed structures. The printed architectures, from woodpile to interdigitated electrodes, are extended over a few mm in the three-dimensions and present struts widths as small as 100 μm. The microsupercapacitors show leading areal capacitance and energy density as compared to planar microsupercapacitors, and stability in different electrolytes

This talk is part of the Department of Materials Science & Metallurgy Seminar Series series.

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