{"id":233,"date":"2011-01-23T12:56:20","date_gmt":"2011-01-23T12:56:20","guid":{"rendered":"http:\/\/blogs.thesocialmedia.com\/leblogenergie\/2011\/01\/23\/la-conception-et-loptimisation-des-accumulateurs-li-ion-font-sans-cesse-des-progres\/"},"modified":"2012-07-16T13:20:48","modified_gmt":"2012-07-16T13:20:48","slug":"la-conception-et-loptimisation-des-accumulateurs-li-ion-font-sans-cesse-des-progres","status":"publish","type":"post","link":"https:\/\/blogs.thesocialmedia.com\/leblogenergie\/2011\/01\/23\/la-conception-et-loptimisation-des-accumulateurs-li-ion-font-sans-cesse-des-progres\/","title":{"rendered":"La conception et l&rsquo;optimisation des accumulateurs Li-Ion font sans-cesse des progr\u00e8s"},"content":{"rendered":"<p>Depuis la sortie des premiers accumulateurs Li-Ion par Sony en 1991 qui reposaient sur les d\u00e9couvertes de l&rsquo;intercalation des ions Lithium dans le graphite par Yazami \u00e0 Grenoble en 1980 et les oxydes lithi\u00e9s d\u00e9crits par Goodenough, la technologie et la ma\u00eetrise de ces accumulateurs n&rsquo;ont cess\u00e9 de progresser. Ont \u00e9t\u00e9 mentionn\u00e9s ici tout derni\u00e8rement, les progr\u00e8s accomplis dans les \u00e9lectrolytes solides, conducteurs des cations Li+, qui devraient permettre de d\u00e9finir des accumulateurs de hautes tensions et de s\u00e9curiser les batteries gr\u00e2ce \u00e0 la suppression d&rsquo;\u00e9lectrolyte organique inflammable (<a href=\"http:\/\/blogs.thesocialmedia.com\/leblogenergie\/files\/2012\/07\/toyota-presente-un-element-daccumulateur-avec-14-volts-de-tension.html_.png\" target=\"_self\">LIRE<\/a>). Un autre axe majeur de progr\u00e8s repose sur l&rsquo;am\u00e9lioration de la conductivit\u00e9 \u00e9lectronique des mat\u00e9riaux et des interfaces entre mat\u00e9riaux et supports. En effet une conductivit\u00e9 am\u00e9lior\u00e9e permet de faire fonctionner les \u00e9lectrodes de fa\u00e7on beaucoup plus homog\u00e8ne et donc de pouvoir atteindre des courants de charge ou de d\u00e9charge plus \u00e9lev\u00e9s. Cette probl\u00e9matique a conduit les technologues \u00e0 utiliser par exemple des <strong>nanofibres de carbone<\/strong> dans la masse positive cathodique compos\u00e9e d&rsquo;un m\u00e9lange intime d&rsquo;oxydes ou de phosphates m\u00e9talliques lithi\u00e9s et de carbone. Mais un nouveau progr\u00e8s majeur semble se d\u00e9mocratiser avec l&rsquo;annonce par Showa Denko de commercialiser comme collecteur de courant\u00a0 <span style=\"color: #bf00bf;\"><strong>un feuillard d&rsquo;aluminium rev\u00eatu de quelques microns d&rsquo;\u00e9paisseur de carbone en surface<\/strong><\/span>. Ce nouveau composant pr\u00e9sente la propri\u00e9t\u00e9 de r\u00e9duire la r\u00e9sistance \u00e9lectronique entre le feuillard et le mat\u00e9riau anodique, probl\u00e8me majeur dans le cas des cathodes \u00e0 base de phosphate de fer lithi\u00e9, LiFePO4.<\/p>\n<p><a href=\"http:\/\/blogs.thesocialmedia.com\/leblogenergie\/files\/2012\/07\/6a00d83451b18369e20148c7e890b1970c-pi.jpg\"><img decoding=\"async\" class=\"asset  asset-image at-xid-6a00d83451b18369e20148c7e890b1970c\" style=\"width: 450px;\" src=\"http:\/\/blogs.thesocialmedia.com\/leblogenergie\/files\/2012\/07\/6a00d83451b18369e20148c7e890b1970c-450wi.jpg\" alt=\"Feuillard-Alu-Showa-Denko\" \/><\/a><\/p>\n<p>L&rsquo;adoption d&rsquo;un mat\u00e9riau cathodique utilisant un m\u00e9tal aussi peu rare et aussi peu cher que le Fer est un des moyens de d\u00e9mocratiser le march\u00e9 des batteries embarqu\u00e9es sur les v\u00e9hicules hybrides ou rechargeables \u00e9lectriquement.<\/p>\n<p>Pour les applications stationnaires le choix est plus vaste en raison de moindres contraintes volumiques et massiques. Pour les applications fixes les batteries au Lithium sont en concurrence avec la technologie Sodium-Soufre qui fait appel comme mat\u00e9riau de base au trivial sulfure de sodium. Un stockage d&rsquo;\u00e9nergie \u00e9lectrique \u00e0 grande \u00e9chelle passerait \u00e0 coup s\u00fbr par cette technologie qui ne fait appel qu&rsquo;\u00e0 des mat\u00e9riaux largement disponibles.<\/p>\n<p><a href=\"http:\/\/www.sdk.co.jp\/english\/news\/2011\/12416.html\" target=\"_blank\">LIRE<\/a> le communiqu\u00e9 de Showa Denko<\/p>\n<p>Le 23 Janvier 2011<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Depuis la sortie des premiers accumulateurs Li-Ion par Sony en 1991 qui reposaient sur les d\u00e9couvertes de l&rsquo;intercalation des ions Lithium dans le graphite par Yazami \u00e0 Grenoble en 1980 et les oxydes lithi\u00e9s d\u00e9crits par Goodenough, la technologie et la ma\u00eetrise de ces accumulateurs n&rsquo;ont cess\u00e9 de progresser. Ont \u00e9t\u00e9 mentionn\u00e9s ici tout derni\u00e8rement, [&hellip;]<\/p>\n","protected":false},"author":341,"featured_media":22491,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-233","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>La conception et l&#039;optimisation des accumulateurs Li-Ion font sans-cesse des progr\u00e8s - leblogenergie.com<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blogs.thesocialmedia.com\/leblogenergie\/2011\/01\/23\/la-conception-et-loptimisation-des-accumulateurs-li-ion-font-sans-cesse-des-progres\/\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:title\" content=\"La conception et l&#039;optimisation des accumulateurs Li-Ion font sans-cesse des progr\u00e8s - leblogenergie.com\" \/>\n<meta name=\"twitter:description\" content=\"Depuis la sortie des premiers accumulateurs Li-Ion par Sony en 1991 qui reposaient sur les d\u00e9couvertes de l&rsquo;intercalation des ions Lithium dans le graphite par Yazami \u00e0 Grenoble en 1980 et les oxydes lithi\u00e9s d\u00e9crits par Goodenough, la technologie et la ma\u00eetrise de ces accumulateurs n&rsquo;ont cess\u00e9 de progresser. 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