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Enhanced thermoelectric performance of V2O5 bulk-type pellet nanodevices by tungsten doping

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Abstract
Bulk-type pellet thermoelectric devices were fabricated by pressing tungsten (W)-doped V2O5 (WxV2-xO5) nanospheres that were synthesized by chemical reaction, and their performance was studied. The sizes of the synthesized WxV2-xO5 nanospheres (x = 0, 0.04, 0.08, and 0.12) were measured as 259 +/- 25, 184 +/- 16, 178 +/- 16, and 180 +/- 21 nm, respectively. The thermoelectric properties were analyzed by obtaining the thermoelectric figure of merit (ZT) using the measured thermal conductivity, electrical conductivity, and Seebeck coefficient in the temperature range of 300-773 K. The thermal conductivity was decreased by the W doping, while the electrical conductivity was increased. As a result, the ZT value increased with the doping concentration, and the maximum ZT value of the W0.08V1.92O5 pellet reached 4.73 x 10(-3), which is 3.3 times larger than that of a pure V2O5 pellet at 773 K.
Author(s)
김현기레캭똡강만일이재기박수동김석원
Issued Date
2021
Type
Article
Keyword
Seebeck coefficientThermal conductivityThermoelectric figure of merit (ZT)Thermoelectric properties of WxV2-xO5Tungsten-doped vanadium pentoxide (WxV2-xO5)nanospheres
DOI
10.1016/j.ceramint.2020.12.004
URI
https://oak.ulsan.ac.kr/handle/2021.oak/9501
https://ulsan-primo.hosted.exlibrisgroup.com/primo-explore/fulldisplay?docid=TN_cdi_crossref_primary_10_1016_j_ceramint_2020_12_004&context=PC&vid=ULSAN&lang=ko_KR&search_scope=default_scope&adaptor=primo_central_multiple_fe&tab=default_tab&query=any,contains,Enhanced%20thermoelectric%20performance%20of%20V2O5%20bulk-type%20pellet%20nanodevices%20by%20tungsten%20doping&offset=0&pcAvailability=true
Publisher
CERAMICS INTERNATIONAL
Location
영국
Language
영어
ISSN
0272-8842
Citation Volume
47
Citation Number
7
Citation Start Page
8834
Citation End Page
8839
Appears in Collections:
Natural Science > Physics
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