Powerful family of two-dimensional materials discovered
Researchers say the material has promising applications, such as in
advanced electronics and high-capacity batteries.

Date:
May 6, 2022
Source:
Tulane University
Summary:
A team has developed a new family of two-dimensional materials that
researchers say has great potential for many applications such as
batteries and supercapacitors, catalysis, sensors and electronics.



FULL STORY ==========================================================================
A team from the Tulane University School of Science and Engineering has developed a new family of two-dimensional materials that researchers
say has promising applications, including in advanced electronics and high-capacity batteries.


==========================================================================
Led by Michael Naguib, an assistant professor in the Department of
Physics and Engineering Physics, the study has been published in the
journal Advanced Materials.

"Two-dimensional materials are nanomaterials with thickness in the
nanometer size (nanometer is one millionth of a millimeter) and lateral dimensions thousands of times the thickness," Naguib said. "Their flatness offers unique set of properties compared to bulk materials." The name of
the new family of 2D materials is transition metal carbo- chalcogenides,
or TMCC. It combines the characteristics of two families of 2D materials
-- transition metal carbides and transition metal dichalcogenides.

Naguib, the Ken & Ruth Arnold Early Career Professor in Science and Engineering, said the latter is a large family of materials that has
been explored extensively and found to be very promising, especially
for electrochemical energy storage and conversion. But he said one of
the challenges in utilizing them is their low electrical conductivity
and stability.

On the other hand, he said, transition metal carbides are excellent
electrical conductors with much more powerful conductivity. Merging the
two families into one is anticipated to have great potential for many applications such as batteries and supercapacitors, catalysis, sensors
and electronics.

"Instead of stacking the two different materials like Lego building blocks
with many problematic interfaces, here we develop a new 2D material that
has the combination of both compositions without any interface," he said.

"We used an electrochemical-assisted exfoliation process by
inserting lithium ions in-between the layers of bulk transition metals carbo-chalcogenides followed by agitation in water," said Ahmad Majed,
the first author of the article and a doctoral candidate in Materials
Physics and Engineering at Tulane working in Naguib's group.

Unlike other exotic nanomaterials, Majed said, the process of making
these 2D TMCC nanomaterials is simple and scalable.

In addition to Naguib and Majed, the team includes Jiang Wei, an associate professor in physics and engineering physics; Jianwei Sun, an assistant professor in physics and engineering physics; PhD candidates Kaitlyn
Prenger, Manish Kothakonda and Fei Wang at Tulane; and Dr Eric N. Tseng
and professor Per O.A. Persson of Linkoping University in Sweden.

This study was supported by Naguib's National Science Foundation Career
Award that he received less than a year ago.


========================================================================== Story Source: Materials provided by Tulane_University. Note: Content
may be edited for style and length.


========================================================================== Journal Reference:
1. Ahmad Majed, Manish Kothakonda, Fei Wang, Eric N. Tseng, Kaitlyn
Prenger,
Xiaodong Zhang, Per O.AA. Persson, Jiang Wei, Jianwei Sun, Michael
Naguib. Transition Metal Carbo‐Chalcogenide "TMCC" a New
Family of Two‐dimensional Materials. Advanced Materials,
2022; 2200574 DOI: 10.1002/adma.202200574 ==========================================================================

Link to news story: https://www.sciencedaily.com/releases/2022/05/220506141135.htm

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