English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Phase-Transition-Enhanced Thermoelectric Transport in Rickardite Mineral Cu3−xTe2

Yahyaoglu, M., Ozen, M., Prots, Y., El Hamouli, O., Tshitoyan, V., Ji, H., et al. (2021). Phase-Transition-Enhanced Thermoelectric Transport in Rickardite Mineral Cu3−xTe2. Chemistry of Materials, 33, 1832-1841. doi:10.1021/acs.chemmater.0c04839.

Item is

Basic

show hide
Genre: Journal Article

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Yahyaoglu, Mujde1, Author
Ozen, Melis1, Author
Prots, Yurii2, Author              
El Hamouli, Oussama1, Author
Tshitoyan, Vahe1, Author
Ji, Huiwen1, Author
Burkhardt, Ulrich3, Author              
Lenoir, Bertrand1, Author
Snyder, G. Jeffrey1, Author
Jain, Anubhav1, Author
Candolfi, Christophe1, Author
Aydemir, Umut1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Yuri Prots, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863424              
3Ulrich Burkhardt, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863422              

Content

show
hide
Free keywords: Copper compounds, Differential scanning calorimetry, Inorganic compounds, Learning systems, Minerals, Phase change materials, Photovoltaic cells, Specific heat, Text mining, Thermal variables measurement, Thermoelectricity, Turing machines, Waste heat, Electronic and thermal transports, Machine learning methods, Powder X ray diffraction, Reversible phase transition, Thermoelectric figure of merit, Thermoelectric performance, Thermoelectric potential, Thermoelectric transport, Thermal conductivity
 Abstract: The binary copper chalcogenides Cu2−δX (X = S, Se, and Te) have recently gained significant interest due to their high thermoelectric performance at moderate temperatures. In an effort to unveil new Cu-based compounds with promising thermoelectric potential, Cu3−xTe2 rickardite mineral emerged as a candidate based on a purely text mining approach applied by a machine learning method. Polycrystalline samples of Cu3−xTe2 within the homogeneity range (x = 0.1, 0.2) were successfully synthesized from the raw elements by a solid-state method. High-temperature powder X-ray diffraction combined with differential scanning calorimetry and specific heat measurements showed several reversible phase transitions at around 458, 640, and 647 K. Signatures of these transitions were observed on the electronic and thermal transport properties, measured over a broad range of temperatures (5−733 K). The transition undergone by this compound at 647 K results in a crossover from metallic-like to semiconducting-like properties. The combination of high power factor and low thermal conductivity in the high-temperature phase results in improved thermoelectric performances with a peak dimensionless thermoelectric figure-of-merit zT of ∼0.14 at 733 K. The synthetic rickardite mineral is an exciting candidate to be used as a phase change material in broad application areas such as in waste heat harvesting and photovoltaic systems. © XXXX American Chemical Society

Details

show
hide
Language(s): eng - English
 Dates: 2021-02-222021-02-22
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1021/acs.chemmater.0c04839
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Chemistry of Materials
  Abbreviation : Chem. Mater.
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Washington, D.C. : American Chemical Society
Pages: - Volume / Issue: 33 Sequence Number: - Start / End Page: 1832 - 1841 Identifier: ISSN: 0897-4756
CoNE: https://pure.mpg.de/cone/journals/resource/954925561571