期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 829, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2020.154634
关键词
MXenes; Free-standing film; Surface terminations; Hydrothermal treatment; Thermoelectric
资金
- National Natural Science Foundation of China [51572117, 51762018]
- natural science foundation of Jiangxi province [20192BAB216011]
- Jiangxi provincial department of education [GJJ170663]
- foundation of Jiangxi science and technology normal university [2017QNBJRC003]
Two-dimensional transition metal carbides and nitrides (MXenes) demonstrate excellent performances in various field as a result of their unique surface group structures and high electrical conductivity. In this work, we employ a simple strategy of surface group modification to optimize the semiconductor performance of a high-conductivity Ti3C2Tx film for thermoelectric energy conversion. In the process, the hydrothermal treatment with different concentrations, temperatures, and types of alkali solutions has significant effects on the thermoelectric properties of Ti3C2Tx. As a result, the modified free-standing Ti3C2Tx film maintained its originally high conductivity (1652 S cm(-1)) and the Seebeck coefficient is improved threefold, leading to an optimized power factor of 44.98 mu W m(-1) K-2 at room temperature. This study provides a new method for the development of the thermoelectric performance of highly-conductive MXene films. (C) 2020 Elsevier B.V. All rights reserved.
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