{"id":480823,"date":"2025-06-01T09:56:41","date_gmt":"2025-06-01T07:56:41","guid":{"rendered":"https:\/\/www.ecinews.fr\/?p=480823"},"modified":"2025-06-01T09:56:41","modified_gmt":"2025-06-01T07:56:41","slug":"la-pile-a-combustible-na-air-produit-1500-wh-kg","status":"publish","type":"post","link":"https:\/\/www.ecinews.fr\/fr\/la-pile-a-combustible-na-air-produit-1500-wh-kg\/","title":{"rendered":"La pile \u00e0 combustible Na-air produit 1500 Wh\/kg"},"content":{"rendered":"

Une cellule H modifi\u00e9e avec des \u00e9lectrodes et une membrane c\u00e9ramique conductrice d’ions pour mener des exp\u00e9riences sur les piles \u00e0 combustible sodium-air<\/h2>\n

L’avenir des v\u00e9hicules \u00e9lectriques et des transports pourrait ne pas d\u00e9pendre des batteries, mais des piles \u00e0 combustible comme celle mise au point par les chercheurs du MIT. La pile \u00e0 combustible n’est pas un dispositif de chargement – elle d\u00e9pend uniquement du combustible. Dans le cas de la pile H, le combustible est le sodium m\u00e9tal liquide, largement disponible et peu co\u00fbteux. De l’autre c\u00f4t\u00e9 de la pile, l’air normal est une source d’atomes d’oxyg\u00e8ne. Entre les deux, une couche de c\u00e9ramique solide sert d \u00ab \u00e9lectrolyte, permettant aux ions sodium de passer librement, et une \u00e9lectrode poreuse orient\u00e9e vers l’air aide le sodium \u00e0 r\u00e9agir chimiquement avec l’oxyg\u00e8ne et \u00e0 produire de l \u00bb \u00e9lectricit\u00e9.<\/p>\n

\u00ab\u00a0Nous nous attendons \u00e0 ce que les gens pensent qu’il s’agit d’une id\u00e9e totalement folle\u00a0\u00bb, d\u00e9clare Chiang, qui est professeur de c\u00e9ramique \u00e0 Kyocera. \u00ab\u00a0Si ce n’\u00e9tait pas le cas, je serais un peu d\u00e9\u00e7u, car si les gens ne pensent pas que quelque chose est totalement fou au d\u00e9but, il est probable que ce ne sera pas si r\u00e9volutionnaire. Lors d’une s\u00e9rie d’exp\u00e9riences avec un prototype, les chercheurs ont d\u00e9montr\u00e9 que cette cellule pouvait transporter plus de trois fois plus d \u00bb \u00e9nergie par unit\u00e9 de poids que les batteries lithium-ion utilis\u00e9es dans la quasi-totalit\u00e9 des v\u00e9hicules \u00e9lectriques actuels.<\/p>\n

Extrait du site web du MIT :<\/a><\/p>\n

L’\u00e9quipe a produit deux versions diff\u00e9rentes d’un prototype du syst\u00e8me \u00e0 l’\u00e9chelle du laboratoire. Dans l’une d’elles, appel\u00e9e cellule H, deux tubes de verre verticaux sont reli\u00e9s par un tube central qui contient un \u00e9lectrolyte c\u00e9ramique solide et une \u00e9lectrode d’air poreuse. Le sodium m\u00e9tal liquide remplit le tube d’un c\u00f4t\u00e9 et l’air circule de l’autre, fournissant l’oxyg\u00e8ne n\u00e9cessaire \u00e0 la r\u00e9action \u00e9lectrochimique au centre, qui finit par consommer progressivement le combustible sodium. L’autre prototype utilise une conception horizontale, avec un plateau de mat\u00e9riau \u00e9lectrolytique contenant le combustible de sodium liquide. L’\u00e9lectrode \u00e0 air poreux, qui facilite la r\u00e9action, est fix\u00e9e au fond du plateau.
\nLes tests effectu\u00e9s avec un flux d’air dont le taux d’humidit\u00e9 est soigneusement contr\u00f4l\u00e9 ont permis d’obtenir un niveau de plus de 1 500 wattheures par kilogramme au niveau d’une \u00ab pile \u00bb individuelle, ce qui se traduirait par plus de 1 000 wattheures au niveau de l’ensemble du syst\u00e8me, pr\u00e9cise M. Chiang.<\/p>\n","protected":false},"excerpt":{"rendered":"

Une cellule H modifi\u00e9e avec des \u00e9lectrodes et une membrane c\u00e9ramique conductrice d’ions pour mener des exp\u00e9riences sur les piles \u00e0 combustible sodium-air L’avenir des v\u00e9hicules \u00e9lectriques et des transports pourrait ne pas d\u00e9pendre des batteries, mais des piles \u00e0 combustible comme celle mise au point par les chercheurs du MIT. La pile \u00e0 combustible […]<\/p>\n","protected":false},"author":7,"featured_media":480692,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[3669,883],"tags":[9862,9863],"domains":[47],"ppma_author":[1139,1153],"class_list":["post-480823","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nouvelles","category-technologies","tag-pile-a-combustible-fr","tag-sodium-air","domains-electronique-eci"],"acf":[],"yoast_head":"La pile \u00e0 combustible Na-air produit 1500 Wh\/kg ...<\/title>\n<meta name=\"description\" content=\"Une cellule H modifi\u00e9e avec des \u00e9lectrodes et une membrane c\u00e9ramique conductrice d'ions pour cr\u00e9er des piles \u00e0 combustible sodium-air\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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