Tunable capacitance in all-inkjet-printed nanosheet heterostructures

Yang Wang, Mohammad Mehrali, Yi Zhou Zhang, Melvin A. Timmerman, Bernard A. Boukamp, Peng Yu Xu, Johan E. ten Elshof*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

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Abstract

Heterostructures constructed from two-dimensional (2D) building blocks have shown promise for field-effect transistors, memory devices, photosensors and other electronic applications. 2D nanosheet crystals are typically constructed into multilayer heterostructures using layer-by-layer methods, which cannot be used to fabricate large-scale and thick heterostructures, due to the time-consuming nature and low efficiency of the process. An alternative approach to deposit different 2D materials in the controllable fashion is by inkjet printing. Here we show the fabrication of supercapacitors based on 2D heterostructures by inkjet printing Ti3C2Tx MXene nanosheets as electrodes, followed by inkjet printing graphene oxide nanosheets as solid-state electrolyte. The free water molecules trapped between graphene oxide sheets facilitate proton movement through the layered solid electrolyte. The as-made heterostructures show high areal capacitance, good cycling stability and high areal energy and power densities comparable with existing printed supercapacitors. Moreover, the specific capacitance can be increased further by addition of liquid electrolytes.

Original languageEnglish
Pages (from-to)318-325
Number of pages8
JournalEnergy Storage Materials
Volume36
DOIs
Publication statusPublished - Apr 2021

Keywords

  • UT-Hybrid-D

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