DataVXACS Applied Materials & InterfacesPaper
journal article·2019-04-03

Effects Of Structural Phase Transition On Thermoelectric Performance in Lithium-Intercalated Molybdenum Disulfide (LixMoS2)

Hong Kuan Ng, Anas Abutaha, Damien Voiry, Ivan Verzhbitskiy, Yongqing Cai, Gang Zhang, Yi Liu, Jing Wu, Manish Chhowalla, Goki Eda, Kedar Hippalgaonkar

ACS Applied Materials & Interfaces· Volume 11· Issue 13
Publisher page
Source abstract

Abstract

Layered transition metal dichalcogenides (TMDCs) intercalated with alkali metals exhibit mixed metallic and semiconducting phases with variable fractions. Thermoelectric properties of such mixed-phase structure are of great interest because of the potential energy filtering effect, wherein interfacial energy barriers strongly scatter cold carriers rather than hot carriers, leading to enhanced Seebeck coefficient (S). Here, we study the thermoelectric properties of mixed-phase LixMoS2 as a function of its phase composition tuned by in situ thermally driven deintercalation. We find that the sign of Seebeck coefficient changes from positive to negative during initial reduction of the 1T/1T′ phase fraction, indicating crossover from p- to n-type carrier conduction. These anomalous changes in Seebeck coefficient, which cannot be simply explained by the effect of deintercalation-induced reduction in carrier density, can be attributed to the hybrid electronic property of the mixed-phase LixMoS2. Our work shows that careful phase engineering is a promising route toward achieving thermoelectric performance in TMDCs.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Advanced Thermoelectric Materials and Devices · 2D Materials and Applications · Heusler alloys: electronic and magnetic properties

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Institute of Materials Research and Engineering, Agency for Science, Technology and Research, #08-03, 2 Fusionopolis Way, Singapore 138634

Department of Physics, National University of Singapore, Singapore 117551

NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore, Center for Life Sciences, #05-01, 28 Medical Drive, Singapore 117456

Center for Advanced 2D Materials and Graphene Research Center, National University of Singapore, Singapore 117546

Institut Européen des Membranes, University of Montpelier, Montpellier 34095, France

Institute of High Performance Computing, Agency for Science, Technology and Research, 1 Fusionopolis Way, #16-16 Connexis, Singapore 138632

Department of Electrical and Computer Engineering, National University of Singapore, Singapore 117583

Department of Materials Science and Engineering, Rutgers−The State University of New Jersey, 607 Taylor Road, Piscataway, New Jersey 08854, United States

Funding

Science and Engineering Research Council

References (33)

Show source-provided references
1. 10.1002/aelm.20180024810.1002/aelm.201800248 ↗
2. 10.1038/s41557-018-0035-610.1038/s41557-018-0035-6 ↗
3. 10.1063/1.496336410.1063/1.4963364 ↗
4. 10.1103/PhysRevB.95.11540710.1103/PhysRevB.95.115407 ↗
5. 10.1063/1.494282710.1063/1.4942827 ↗
6. 10.1038/ncomms1321110.1038/ncomms13211 ↗
7. 10.1039/C7TC01088E10.1039/C7TC01088E ↗
8. 10.1103/PhysRevB.87.07520410.1103/PhysRevB.87.075204 ↗
9. 10.1038/ncomms521410.1038/ncomms5214 ↗
10. 10.1038/nmat408010.1038/nmat4080 ↗
11. 10.1063/1.482708210.1063/1.4827082 ↗
12. 10.1038/nphys418810.1038/nphys4188 ↗
13. 10.1016/j.nanoen.2016.05.02210.1016/j.nanoen.2016.05.022 ↗
14. 10.1021/jp407635510.1021/jp4076355 ↗
15. 10.1038/nature2404310.1038/nature24043 ↗
16. 10.1021/acsnano.8b0264910.1021/acsnano.8b02649 ↗
17. 10.1103/PhysRevB.44.395510.1103/PhysRevB.44.3955 ↗
18. 10.1021/cm800020p10.1021/cm800020p ↗
19. 10.1021/acs.jpcc.5b0465810.1021/acs.jpcc.5b04658 ↗
20. 10.1007/s11434-013-5834-y10.1007/s11434-013-5834-y ↗
21. 10.1007/978-3-642-00716-310.1007/978-3-642-00716-3 ↗
22. 10.1088/0953-8984/21/17/17570310.1088/0953-8984/21/17/175703 ↗
23. 10.1016/j.cplett.2013.10.03410.1016/j.cplett.2013.10.034 ↗
24. 10.1002/adma.20150135010.1002/adma.201501350 ↗
25. 10.1038/s41467-018-04435-x10.1038/s41467-018-04435-x ↗
26. 10.1021/jacs.5b1184910.1021/jacs.5b11849 ↗
27. 10.1002/adma.20160676010.1002/adma.201606760 ↗
28. 10.1088/2053-1583/3/2/02200210.1088/2053-1583/3/2/022002 ↗
29. 10.1038/nnano.2014.6410.1038/nnano.2014.64 ↗
30. 10.1021/nn302422x10.1021/nn302422x ↗
31. 10.1038/s41598-017-07648-010.1038/s41598-017-07648-0 ↗
32. 10.1021/ja501686w10.1021/ja501686w ↗
33. 10.1021/acs.nanolett.5b0119610.1021/acs.nanolett.5b01196 ↗