April 22 - 26, 2024
Seattle, Washington
May 7 - 9, 2024 (Virtual)

Event Supporters

2024 MRS Spring Meeting
NM01.03.05

Defect Engineering of MXenes at Elevated Temperatures

When and Where

Apr 24, 2024
10:00am - 10:15am
Room 330, Level 3, Summit

Presenter(s)

Co-Author(s)

Brian Wyatt1,Matthew Boebinger2,Paul Kent3,Zachary Hood4,Shiba Adhikari4,Kartik Nemani1,Murali Gopal Muraleedharan3,Annabelle Bedford1,Wyatt Highland1,Raymond Unocic2,Babak Anasori1

Purdue University1,Center for Nanophase Materials Sciences2,Oak Ridge National Laboratory3,Argonne National Laboratory4

Abstract

Brian Wyatt1,Matthew Boebinger2,Paul Kent3,Zachary Hood4,Shiba Adhikari4,Kartik Nemani1,Murali Gopal Muraleedharan3,Annabelle Bedford1,Wyatt Highland1,Raymond Unocic2,Babak Anasori1

Purdue University1,Center for Nanophase Materials Sciences2,Oak Ridge National Laboratory3,Argonne National Laboratory4
The chemically diverse family of 2D MXenes have been widely adopted in areas such as energy storage, conversion, and electronics. From the ceramic perspective, MXenes uniquely enable the atomic control of its structure at the ~1 nm scale. In this presentation, we demonstrate the defect engineering of Mo<sub>2</sub>TiC<sub>2</sub>T<i><sub>x</sub></i>, Ti<sub>3</sub>C<sub>2</sub>T<i><sub>x</sub></i>, Mo<sub>2</sub>Ti<sub>2</sub>C<sub>3</sub>T<i><sub>x</sub></i>, and Nb<sub>2</sub>CT<i><sub>x</sub></i> MXenes at elevated temperatures using alkali cations. We demonstrate the improved phase stability of MXenes and control of formed carbide phases using <i>in situ</i> x-ray diffraction and scanning transmission electron microscopy techniques. Further, we present evidence for the role of partial occupation of alkali cations in defective sites in MXenes using computational methods paired with <i>in </i>and <i>ex </i>situ methods. Overall, this cation-based engineering of defects in 2D MXenes demonstrates the potential for improving their stability and further develops the tools for researchers to apply MXenes as a diverse and tunable family of nanoceramics for high temperature applications.

Keywords

defects | phase transformation

Symposium Organizers

Stefano Ippolito, Drexel University
Michael Naguib, Tulane University
Zhimei Sun, Beihang University
Xuehang Wang, Delft University of Technology

Symposium Support

Gold
Murata Manufacturing Co., Ltd.

Silver
INNOMXENE Co.,Ltd.

Bronze
Energy Advances
Progress in Materials Science The Institution of Engineering and Technology (IET)

Session Chairs

Stefano Ippolito
Ruocun Wang

In this Session