Correlating electronic properties with M-site composition in solid solution Ti yNb2-yCTx MXenes
- Drexel Univ., Philadelphia, PA (United States); OSTI
- Drexel Univ., Philadelphia, PA (United States)
- Temple Univ., Philadelphia, PA (United States)
High electrical conductivity is desired in MXene films for applications such as electromagnetic interference shielding, antennas, and electrodes for electrochemical energy storage and conversion applications. Due to the acid etching-based synthesis method, it is challenging to deconvolute the relative importance that factors such as chemical composition and flake size contribute to resistivity. To understand the intrinsic and extrinsic contributions to the macroscopic electronic transport properties, a systematic study controlling compositional and structural parameters was conducted with eight solid solutions in the TiyNb2-yCTx system. Here, in particular, we investigated the different roles played by metal (M)-site composition, flake size, and d-spacing on macroscopic transport. Hard x-ray photoemission spectroscopy and spectroscopic ellipsometry revealed changes to electronic structure induced by the M-site alloying. Consistent with the spectroscopic results, the low- and room-temperature conductivities and effective carrier mobility are correlated with the Ti content, while the impact of flake size and d-spacing is most prominent in low-temperature transport. The results provide guidance for designing and engineering MXenes with a wide range of conductivities.
- Research Organization:
- Drexel Univ., Philadelphia, PA (United States); Temple Univ., Philadelphia, PA (United States)
- Sponsoring Organization:
- National Science Foundation (NSF); US Army Research Office (ARO); USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE)
- Grant/Contract Number:
- SC0018618; SC0019297
- OSTI ID:
- 2420846
- Journal Information:
- 2D Materials, Journal Name: 2D Materials Journal Issue: 1 Vol. 10; ISSN 2053-1583
- Publisher:
- IOP PublishingCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Effect of Acid Etching Time in Ti3C2 MXene’s Interlayer Spacing and Conductivity
Atomic-scale investigations of Ti3C2Tx MXene surfaces
Tailoring Electronic and Optical Properties of MXenes through Forming Solid Solutions
Journal Article
·
Tue Jul 23 20:00:00 EDT 2024
· Microscopy and Microanalysis
·
OSTI ID:2349400
Atomic-scale investigations of Ti3C2Tx MXene surfaces
Journal Article
·
Tue Jul 02 20:00:00 EDT 2024
· Matter (Online)
·
OSTI ID:2500268
Tailoring Electronic and Optical Properties of MXenes through Forming Solid Solutions
Journal Article
·
Mon Oct 26 20:00:00 EDT 2020
· Journal of the American Chemical Society
·
OSTI ID:1774152