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Lithiation Induced Phases in 1T'-MoTe2 Nanoflakes

Journal Article · · ACS Nano
 [1];  [2];  [3];  [4];  [5];  [6];  [7];  [6];  [6];  [6];  [3];  [5];  [6]
  1. Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States; Department of Mechanical Engineering and Materials Science, Yale University, New Haven, Connecticut 06511, United States
  2. National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, New York 11973, United States
  3. Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06511, United States; Energy Sciences Institute, Yale West Campus, West Haven, Connecticut 06516, United States
  4. Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States; Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
  5. Department of Mechanical Engineering and Materials Science, Yale University, New Haven, Connecticut 06511, United States
  6. Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States
  7. Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, 1 Bethel Valley Road, Oak Ridge, Tennessee 37830 United States
Multiple polytypes of MoTe2 with distinct structures and intriguing electronic properties can be accessed by various physical and chemical approaches. Here, in this study, we report electrochemical lithium (Li) intercalation into 1T'-MoTe2 nanoflakes, leading to the discovery of two previously unreported lithiated phases. Distinguished by their structural differences from the pristine 1T' phase, these distinct phases were characterized using in situ polarization Raman spectroscopy and in situ single-crystal X-ray diffraction. The lithiated phases exhibit increasing resistivity with decreasing temperature, and their carrier densities are two to 4 orders of magnitude smaller than the metallic 1T' phase, as probed through in situ Hall measurements. The discovery of these gapped phases in initially metallic 1T'-MoTe2 underscores electrochemical intercalation as a potent tool for tuning the phase stability and electron density in two-dimensional (2D) materials.
Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
National Science Foundation (NSF); US Air Force Office of Scientific Research (AFOSR); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF)
Grant/Contract Number:
AC02-05CH11231; AC05-00OR22725; SC0012704; SC0019445; SC0021965
OSTI ID:
2432572
Alternate ID(s):
OSTI ID: 2438821
Report Number(s):
BNL--225950-2024-JAAM
Journal Information:
ACS Nano, Journal Name: ACS Nano Journal Issue: 26 Vol. 18; ISSN 1936-0851
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

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