{"id":6545,"date":"2023-08-01T09:21:28","date_gmt":"2023-08-01T07:21:28","guid":{"rendered":"https:\/\/micronora-informations.fr\/?p=4763"},"modified":"2023-08-01T09:21:28","modified_gmt":"2023-08-01T07:21:28","slug":"concevoir-des-materiaux-thermoelectriques-plus-performants-2","status":"publish","type":"post","link":"https:\/\/micronora.com\/en\/concevoir-des-materiaux-thermoelectriques-plus-performants-2\/","title":{"rendered":"Concevoir des mat\u00e9riaux thermo\u00e9lectriques plus performants"},"content":{"rendered":"<p><strong><em>Au c\u0153ur des g\u00e9n\u00e9rateurs thermo\u00e9lectriques, des mat\u00e9riaux semi-conducteurs sont intensivement \u00e9tudi\u00e9s pour accro\u00eetre les performances de ces dispositifs qui g\u00e9n\u00e8rent de l\u2019\u00e9lectricit\u00e9 \u00e0 partir de chaleur. Des chimistes du Laboratoire de cristallographie et sciences des mat\u00e9riaux (CRISMAT\/\u00a0CNRS\/Universit\u00e9 Caen Normandie\/Ensicaen) ont synth\u00e9tis\u00e9 un nouveau mat\u00e9riau sulfure d\u2019origine min\u00e9rale pr\u00e9sentant des propri\u00e9t\u00e9s thermo\u00e9lectriques remarquables. Ces travaux, men\u00e9s en collaboration avec l\u2019Institut des sciences chimiques de Rennes (ISCR\/CNRS\/Universit\u00e9 Rennes1\/ENSCR\/INSA Rennes), l\u2019institut N\u00e9el, l\u2019universit\u00e9 de Central Michigan (USA) et l\u2019universit\u00e9 de Kyushu (Japon), ont \u00e9t\u00e9 publi\u00e9s dans les revues\u00a0Advanced Energy Materials\u00a0et\u00a0Angewandte Chemie.<\/em><\/strong><\/p>\n<p><img decoding=\"async\" class=\" wp-image-4764 aligncenter\" src=\"https:\/\/micronora.com\/wp-content\/uploads\/2023\/08\/3-guilmeau3-300x154.jpg\" alt=\"actu aout 2023\" width=\"358\" height=\"184\" \/><\/p>\n<p>La g\u00e9n\u00e9ration d&#8217;\u00e9lectricit\u00e9 \u00e0 partir de chaleur dissip\u00e9e au moyen de modules thermo\u00e9lectriques (effet Seebeck) repr\u00e9sente une\u00a0voie particuli\u00e8rement prometteuse de production d\u2019\u00e9nergie \u00ab\u00a0verte\u00a0\u00bb. Cette technologie pr\u00e9sente des avantages ind\u00e9niables en mati\u00e8re de fiabilit\u00e9, de maintenance, d\u2019absence de vibrations, qui la rendent attractive pour des utilisations\u00a0dans les domaines automobile, a\u00e9ronautique, de l\u2019industrie ou du b\u00e2timent. Pour accro\u00eetre les rendements des dispositifs (aujourd\u2019hui en de\u00e7\u00e0 des 10 %), les scientifiques s\u2019attachent \u00e0 concevoir de nouveaux mat\u00e9riaux\u00a0plus efficaces. Le d\u00e9fi est de synth\u00e9tiser un mat\u00e9riau dans lequel les propri\u00e9t\u00e9s \u00e9lectriques et thermiques sont d\u00e9coupl\u00e9es. En bref, comment \u00e9laborer un conducteur \u00e9lectrique qui conduit tr\u00e8s peu la chaleur ?<\/p>\n<p>Gr\u00e2ce \u00e0 leurs structures cristallographiques complexes, certains sulfures de cuivre d\u2019origine min\u00e9rale comme la colusite<a href=\"https:\/\/www.inc.cnrs.fr\/fr\/cnrsinfo\/concevoir-des-materiaux-thermoelectriques-plus-performants#_ftn1\">[1]<\/a>\u00a0associent une conductivit\u00e9 \u00e9lectrique \u00e9lev\u00e9e et une faible conductivit\u00e9 thermique. En jouant sur la formulation du mat\u00e9riau, les chimistes du CRISMAT ont r\u00e9ussi \u00e0 synth\u00e9tiser un nouveau compos\u00e9<a href=\"https:\/\/www.inc.cnrs.fr\/fr\/cnrsinfo\/concevoir-des-materiaux-thermoelectriques-plus-performants#_ftn2\">[2]<\/a>\u00a0d\u00e9riv\u00e9 de la colusite. La pr\u00e9sence de chrome dans la structure influe sur le r\u00e9seau conducteur Cu-S et a permis d\u2019atteindre un \u00ab\u00a0facteur de puissance\u00a0\u00bb\u00a0<a href=\"https:\/\/www.inc.cnrs.fr\/fr\/cnrsinfo\/concevoir-des-materiaux-thermoelectriques-plus-performants#_ftn3\">[3]<\/a>\u00a0record parmi les mat\u00e9riaux sulfures.\u00a0Ces r\u00e9sultats offrent de nouvelles perspectives pour le d\u00e9veloppement de mat\u00e9riaux sulfures thermo\u00e9lectriques.<\/p>\n<p>Emmanuel Guilmeau<\/p>\n<p>&nbsp;<\/p>\n<p><a href=\"https:\/\/www.inc.cnrs.fr\/fr\/cnrsinfo\/concevoir-des-materiaux-thermoelectriques-plus-performants#_ftnref1\">[1]<\/a>\u00a0La colusite (Cu<sub>26<\/sub>V<sub>2<\/sub>Sn<sub>6<\/sub>S<sub>32<\/sub>) est un semi-conducteur d\u00e9g\u00e9n\u00e9r\u00e9 dit \u00ab\u00a0de type p\u00a0\u00bb<\/p>\n<p><a href=\"https:\/\/www.inc.cnrs.fr\/fr\/cnrsinfo\/concevoir-des-materiaux-thermoelectriques-plus-performants#_ftnref2\">[2]<\/a>\u00a0De formule Cu<sub>26<\/sub>Cr<sub>2<\/sub>Ge<sub>6<\/sub>S<sub>32<\/sub><\/p>\n<p><a href=\"https:\/\/www.inc.cnrs.fr\/fr\/cnrsinfo\/concevoir-des-materiaux-thermoelectriques-plus-performants#_ftnref3\">[3]<\/a>\u00a0c\u2019est-\u00e0-dire la performance \u00e9lectrique<\/p>\n<p>&nbsp;<\/p>\n<p><strong>R\u00e9f\u00e9rences<\/strong><\/p>\n<p>Ventrapati Pavan Kumar, Andrew R. Supka, Pierric Lemoine,\u00a0Oleg\u00a0I. Lebedev, Bernard Raveau, Koichiro Suekuni, Vivian Nassif, Rabih Al Rahal Al Orabi, Marco Fornari, Emmanuel Guilmeau<br \/>\n<strong>High Power Factors of Thermoelectric Colusites Cu<sub>26<\/sub>T<sub>2<\/sub>Ge<sub>6<\/sub>S<sub>32<\/sub>\u00a0(T = Cr, Mo, W): Toward Functionalization of the Conductive \u201cCu-S\u201d Network<\/strong><br \/>\n<em>Advanced Energy Materials\u00a0<\/em><\/p>\n<p>Ventrapati Pavan Kumar, Gabin Gu\u00e9lou, Pierric Lemoine, Bernard Raveau, Andrew R. Supka, Rabih Al Rahal Al Orabi, Marco Fornari, Koichiro Suekuni, Emmanuel Guilmeau<br \/>\n<strong>Copper-rich thermoelectric sulfides: size mismatch effect and chemical disorder in the [<em>T<\/em>S<sub>4<\/sub>]Cu<sub>6<\/sub>\u00a0complexes of Cu<sub>26<\/sub><em>T<\/em><sub>2<\/sub>Ge<sub>6<\/sub>S<sub>32<\/sub>\u00a0(<em>T<\/em>\u00a0= Cr,Mo,W) colusites<\/strong><br \/>\n<em>Angewandte Chemie International Edition<\/em><\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Au c\u0153ur des g\u00e9n\u00e9rateurs thermo\u00e9lectriques, des mat\u00e9riaux semi-conducteurs sont intensivement  [&#8230;]<\/p>\n","protected":false},"author":5,"featured_media":1765980005,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[60],"tags":[],"class_list":["post-6545","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actu-microtechnique"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - 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