{"id":2666625,"date":"2026-01-09T01:01:53","date_gmt":"2026-01-09T01:01:53","guid":{"rendered":"https:\/\/www.pressenza.com\/?p=2666625"},"modified":"2026-01-09T01:03:07","modified_gmt":"2026-01-09T01:03:07","slug":"dans-lespace-la-chine-devoile-de-nouveaux-mecanismes-des-batteries-au-lithium","status":"publish","type":"post","link":"https:\/\/www.pressenza.com\/fr\/2026\/01\/dans-lespace-la-chine-devoile-de-nouveaux-mecanismes-des-batteries-au-lithium\/","title":{"rendered":"Dans l\u2019espace, la Chine d\u00e9voile de nouveaux m\u00e9canismes des batteries au lithium"},"content":{"rendered":"<p dir=\"auto\">La station spatiale Tiangong de Chine a servi de cadre \u00e0 une exp\u00e9rience innovante sur les batteries lithium-ion, men\u00e9e par les trois astronautes de la mission Shenzhou-21, selon l&rsquo;Institut de physique chimique de Dalian de l&rsquo;Acad\u00e9mie chinoise des sciences. Cette \u00e9tude exploite l&rsquo;environnement unique de microgravit\u00e9 pour d\u00e9m\u00ealer des m\u00e9canismes internes quasi impossibles \u00e0 observer sur Terre.<\/p>\n<p dir=\"auto\"><strong>D\u00e9fis terrestres des batteries<\/strong><\/p>\n<p dir=\"auto\">Les batteries lithium-ion sont essentielles aux missions spatiales gr\u00e2ce \u00e0 leur haute densit\u00e9 \u00e9nerg\u00e9tique, qui mesure la quantit\u00e9 d&rsquo;\u00e9nergie qu&rsquo;elles peuvent stocker par unit\u00e9 de poids ou de volume, et leur fiabilit\u00e9 dans des conditions extr\u00eames. \u00c0 l&rsquo;int\u00e9rieur, l&rsquo;\u00e9lectrolyte \u2014 une solution liquide ou en gel qui conduit les ions entre l&rsquo;anode (\u00e9lectrode n\u00e9gative) et la cathode (positive) \u2014 joue un r\u00f4le cl\u00e9, car il permet le flux des ions de lithium pendant la charge et la d\u00e9charge. Sur Terre, la gravit\u00e9 complique ce processus : elle g\u00e9n\u00e8re des courants convectifs qui se m\u00e9langent constamment aux champs \u00e9lectriques produits par la batterie, d\u00e9formant la distribution naturelle des substances chimiques dans l&rsquo;\u00e9lectrolyte et affectant \u00e0 la fois la puissance (capacit\u00e9 \u00e0 d\u00e9livrer de l&rsquo;\u00e9nergie rapidement) et la dur\u00e9e de vie (nombre de cycles de charge avant d\u00e9gradation).<\/p>\n<p dir=\"auto\"><strong>Avantages de la microgravit\u00e9<\/strong><\/p>\n<p dir=\"auto\">La station est en orbite terrestre basse, donc en environnement de microgravit\u00e9 orbitale de Tiangong,\u00a0ces effets gravitationnels disparaissent, permettant pour la premi\u00e8re fois d&rsquo;isoler l&rsquo;influence pure des champs \u00e9lectriques sur l&rsquo;\u00e9lectrolyte. Cela r\u00e9v\u00e8le comment les ions et les solvants se distribuent sans interf\u00e9rences, fournissant des donn\u00e9es pr\u00e9cises sur l&rsquo;interaction entre les forces gravitationnelles et \u00e9lectriques qui \u00e9taient auparavant ins\u00e9parables dans les exp\u00e9riences terrestres. Le r\u00e9sultat est une vision claire des processus \u00e9lectrochimiques fondamentaux, tels que la migration ionique et la formation de gradients de concentration.<\/p>\n<p dir=\"auto\"><strong>Implications futures<\/strong><\/p>\n<p dir=\"auto\">Les d\u00e9couvertes promettent de surmonter les limitations actuelles des batteries orbitales, en optimisant leurs performances dans des environnements spatiaux hostiles. De plus, elles guideront la conception d&rsquo;une nouvelle g\u00e9n\u00e9ration de batteries plus s\u00fbres \u2014 avec un risque moindre de surchauffe ou de fuites \u2014 et de plus haute densit\u00e9 \u00e9nerg\u00e9tique, essentielles pour des explorations prolong\u00e9es comme les missions vers Mars ou des bases lunaires. Ce progr\u00e8s b\u00e9n\u00e9ficie non seulement \u00e0 l&rsquo;espace, mais pourrait aussi influencer des applications terrestres telles que les v\u00e9hicules \u00e9lectriques et le stockage d&rsquo;\u00e9nergie renouvelable.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>La station spatiale Tiangong de Chine a servi de cadre \u00e0 une exp\u00e9rience innovante sur les batteries lithium-ion, men\u00e9e par les trois astronautes de la mission Shenzhou-21, selon l&rsquo;Institut de physique chimique de Dalian de l&rsquo;Acad\u00e9mie chinoise des sciences. Cette&hellip;<\/p>\n","protected":false},"author":1757,"featured_media":2666626,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[163,495],"tags":[104507,97396,9070],"class_list":["post-2666625","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-opinion-fr","category-sciences-technologie","tag-recherche-scientifique","tag-technologie-spatiale","tag-transition-energetique"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.1.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Dans l\u2019espace, la Chine d\u00e9voile de nouveaux m\u00e9canismes des batteries au lithium<\/title>\n<meta name=\"description\" content=\"La station spatiale Tiangong de Chine a servi de cadre \u00e0 une exp\u00e9rience innovante sur les batteries lithium-ion, men\u00e9e par les trois astronautes de la\" \/>\n<meta name=\"robots\" content=\"index, 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She is a humanist and an activist for social justice causes.","url":"https:\/\/www.pressenza.com\/fr\/author\/claudia-aranda\/"}]}},"place":"Montr\u00e9al, Canada","original_article_url":"","_links":{"self":[{"href":"https:\/\/www.pressenza.com\/fr\/wp-json\/wp\/v2\/posts\/2666625","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.pressenza.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.pressenza.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.pressenza.com\/fr\/wp-json\/wp\/v2\/users\/1757"}],"replies":[{"embeddable":true,"href":"https:\/\/www.pressenza.com\/fr\/wp-json\/wp\/v2\/comments?post=2666625"}],"version-history":[{"count":3,"href":"https:\/\/www.pressenza.com\/fr\/wp-json\/wp\/v2\/posts\/2666625\/revisions"}],"predecessor-version":[{"id":2666632,"href":"https:\/\/www.pressenza.com\/fr\/wp-json\/wp\/v2\/posts\/2666625\/revisions\/2666632"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.pressenza.com\/fr\/wp-json\/wp\/v2\/media\/2666626"}],"wp:attachment":[{"href":"https:\/\/www.pressenza.com\/fr\/wp-json\/wp\/v2\/media?parent=2666625"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.pressenza.com\/fr\/wp-json\/wp\/v2\/categories?post=2666625"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.pressenza.com\/fr\/wp-json\/wp\/v2\/tags?post=2666625"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}