{"id":14155,"date":"2025-03-21T00:53:31","date_gmt":"2025-03-21T00:53:31","guid":{"rendered":"https:\/\/www.ball-mill-classifiers.com\/?p=14155"},"modified":"2025-03-21T00:53:33","modified_gmt":"2025-03-21T00:53:33","slug":"surface-modification-allows-graphite-anode-to-stand-out","status":"publish","type":"post","link":"https:\/\/www.ball-mill-classifiers.com\/fr\/surface-modification-allows-graphite-anode-to-stand-out\/","title":{"rendered":"La modification de surface permet \u00e0 l&#039;anode en graphite de se d\u00e9marquer"},"content":{"rendered":"<p>Le graphite a \u00e9t\u00e9 le premier mat\u00e9riau d\u2019anode commercialis\u00e9 pour les batteries lithium-ion.<br>Le premier mod\u00e8le commercial de batterie lithium-ion, d\u00e9velopp\u00e9 par Sony au Japon en 1990, associait l&#039;oxyde de lithium-cobalt au graphite. Apr\u00e8s trente ans de d\u00e9veloppement, le graphite reste le mat\u00e9riau d&#039;anode le plus fiable et le plus utilis\u00e9. La modification de surface du graphite est devenue l&#039;axe d&#039;am\u00e9lioration principal des syst\u00e8mes de batteries lithium haute s\u00e9curit\u00e9.<\/p>\n\n\n\n<p><a href=\"https:\/\/en.wikipedia.org\/wiki\/Graphite\">Graphite<\/a> pr\u00e9sente une bonne structure feuillet\u00e9e, avec des atomes de carbone dispos\u00e9s selon un motif hexagonal s&#039;\u00e9tendant dans deux dimensions. La force de liaison intercouche est la force de Van der Waals, avec une distance intercouche de 0,3354 nm, pr\u00e9sentant des caract\u00e9ristiques anisotropes.<br>Le graphite, utilis\u00e9 comme mat\u00e9riau d&#039;anode pour les batteries lithium-ion, pr\u00e9sente une s\u00e9lectivit\u00e9 \u00e9lev\u00e9e pour les \u00e9lectrolytes. Cependant, ses performances en charge et d\u00e9charge \u00e0 courant \u00e9lev\u00e9 sont m\u00e9diocres. Lors du premier cycle de charge et de d\u00e9charge, des ions lithium solvat\u00e9s s&#039;ins\u00e8rent entre les couches de graphite. Ces ions se r\u00e9duisent et se d\u00e9composent pour produire de nouvelles substances, provoquant une expansion volumique. Ceci peut entra\u00eener l&#039;effondrement des couches de graphite, d\u00e9gradant ainsi les performances de cyclage de l&#039;\u00e9lectrode.<br>Par cons\u00e9quent, une modification du graphite est n\u00e9cessaire pour am\u00e9liorer sa capacit\u00e9 r\u00e9versible.<br>Il am\u00e9liore \u00e9galement la qualit\u00e9 du film SEI, augmente la compatibilit\u00e9 avec les \u00e9lectrolytes et am\u00e9liore les performances de cyclisme.<\/p>\n\n\n\n<p>Actuellement, les m\u00e9thodes de modification de surface des anodes en graphite comprennent principalement le broyage m\u00e9canique \u00e0 billes, l&#039;oxydation et l&#039;halog\u00e9nation de surface, le rev\u00eatement de surface et le dopage des \u00e9l\u00e9ments.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"739\" height=\"630\" src=\"https:\/\/www.ball-mill-classifiers.com\/wp-content\/uploads\/2025\/03\/graphite.webp\" alt=\"graphite\" class=\"wp-image-14157\" srcset=\"https:\/\/www.ball-mill-classifiers.com\/wp-content\/uploads\/2025\/03\/graphite.webp 739w, https:\/\/www.ball-mill-classifiers.com\/wp-content\/uploads\/2025\/03\/graphite-300x256.webp 300w, https:\/\/www.ball-mill-classifiers.com\/wp-content\/uploads\/2025\/03\/graphite-14x12.webp 14w, https:\/\/www.ball-mill-classifiers.com\/wp-content\/uploads\/2025\/03\/graphite-600x512.webp 600w\" sizes=\"(max-width: 739px) 100vw, 739px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Broyage m\u00e9canique \u00e0 boulets<\/h2>\n\n\n\n<p>La m\u00e9thode de broyage m\u00e9canique \u00e0 billes modifie la structure et la morphologie de la surface de l&#039;anode en graphite par des moyens physiques. Cela augmente la surface et la zone de contact, am\u00e9liorant ainsi le stockage et la lib\u00e9ration des ions lithium.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>R\u00e9duction de la taille des particules : <\/strong>Le broyage m\u00e9canique \u00e0 boulets peut r\u00e9duire consid\u00e9rablement la taille des particules de graphite, conf\u00e9rant au mat\u00e9riau d&#039;anode en graphite une surface sp\u00e9cifique plus grande.<br>Des particules de plus petite taille facilitent la diffusion rapide des ions lithium, am\u00e9liorant ainsi les performances de la batterie.<\/li>\n\n\n\n<li><strong>Pr\u00e9sentation de nouvelles phases : <\/strong> Lors du broyage \u00e0 boulets, les particules de graphite peuvent subir des transitions de phase dues \u00e0 des forces m\u00e9caniques, comme l&#039;introduction d&#039;une nouvelle phase rhombo\u00efdale.<br>La pr\u00e9sence de ces nouvelles phases offre davantage de sites de stockage de lithium, am\u00e9liorant ainsi la capacit\u00e9 de stockage de lithium du graphite.<\/li>\n\n\n\n<li><\/li>\n\n\n\n<li><strong>Augmentation de la porosit\u00e9 :<\/strong> Le broyage \u00e0 billes cr\u00e9e \u00e9galement de nombreux micropores et d\u00e9fauts \u00e0 la surface des particules de graphite. Ces structures poreuses agissent comme des canaux rapides pour les ions lithium, am\u00e9liorant leur vitesse de diffusion et l&#039;efficacit\u00e9 de charge et de d\u00e9charge de la batterie.<\/li>\n\n\n\n<li><strong>Am\u00e9lioration de la conductivit\u00e9 :<\/strong> Le broyage m\u00e9canique \u00e0 boulets ne modifie pas directement la conductivit\u00e9 du graphite.<br>Il r\u00e9duit la taille des particules et introduit de la porosit\u00e9.<br>Cela permet un meilleur contact entre l\u2019anode en graphite et l\u2019\u00e9lectrolyte.<br>En cons\u00e9quence, la conductivit\u00e9 et les performances \u00e9lectrochimiques de la batterie s\u2019am\u00e9liorent.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"1000\" height=\"1000\" src=\"https:\/\/www.ball-mill-classifiers.com\/wp-content\/uploads\/2025\/03\/ball-mill-3.webp\" alt=\"ball-mill-3\" class=\"wp-image-14158\" srcset=\"https:\/\/www.ball-mill-classifiers.com\/wp-content\/uploads\/2025\/03\/ball-mill-3.webp 1000w, https:\/\/www.ball-mill-classifiers.com\/wp-content\/uploads\/2025\/03\/ball-mill-3-300x300.webp 300w, https:\/\/www.ball-mill-classifiers.com\/wp-content\/uploads\/2025\/03\/ball-mill-3-100x100.webp 100w, https:\/\/www.ball-mill-classifiers.com\/wp-content\/uploads\/2025\/03\/ball-mill-3-768x768.webp 768w, https:\/\/www.ball-mill-classifiers.com\/wp-content\/uploads\/2025\/03\/ball-mill-3-12x12.webp 12w, https:\/\/www.ball-mill-classifiers.com\/wp-content\/uploads\/2025\/03\/ball-mill-3-60x60.webp 60w, https:\/\/www.ball-mill-classifiers.com\/wp-content\/uploads\/2025\/03\/ball-mill-3-600x600.webp 600w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><figcaption class=\"wp-element-caption\">broyeur \u00e0 boulets-3<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Traitement d&#039;oxydation et d&#039;halog\u00e9nation de surface<\/h2>\n\n\n\n<p>Les traitements d\u2019oxydation et d\u2019halog\u00e9nation peuvent am\u00e9liorer les propri\u00e9t\u00e9s chimiques interfaciales des mat\u00e9riaux d\u2019anode en graphite.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Oxydation de surface<\/strong><\/h3>\n\n\n\n<p>L&#039;oxydation de surface comprend g\u00e9n\u00e9ralement l&#039;oxydation en phase gazeuse et l&#039;oxydation en phase liquide.<\/p>\n\n\n\n<p>L&#039;oxydation en phase gazeuse utilise principalement l&#039;air, l&#039;O\u2082, l&#039;O\u2083, le CO\u2082, le C\u2082H\u2082 et d&#039;autres gaz comme oxydants. Ces gaz r\u00e9agissent avec le graphite lors d&#039;une r\u00e9action d&#039;interface gaz-solide, r\u00e9duisant ainsi les sites actifs \u00e0 la surface du graphite. Cela r\u00e9duit la perte de capacit\u00e9 irr\u00e9versible au premier cycle.<br>Parall\u00e8lement, il g\u00e9n\u00e8re davantage de micropores et de nanocanaux, augmentant ainsi l&#039;espace de stockage des ions lithium. Cela contribue \u00e0 am\u00e9liorer la capacit\u00e9 r\u00e9versible et les performances de l&#039;anode en graphite.<\/p>\n\n\n\n<p>L&#039;oxydation en phase liquide utilise principalement des solutions d&#039;oxydants chimiques puissants comme HNO3, H2SO4 et H2O2 pour r\u00e9agir avec le graphite. Cela am\u00e9liore ses performances \u00e9lectrochimiques.<br>Cependant, un contr\u00f4le inad\u00e9quat de la solution peut entra\u00eener l&#039;effondrement des couches de graphite. Il est donc important de se demander si les impuret\u00e9s introduites pourraient nuire aux performances de l&#039;\u00e9lectrode. De plus, la r\u00e9action produit des gaz ou des solutions nocifs pour l&#039;environnement, les instruments et les \u00e9quipements.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Halog\u00e9nation de surface<\/h3>\n\n\n\n<p>Gr\u00e2ce \u00e0 l&#039;halog\u00e9nation, des structures CF se forment \u00e0 la surface du graphite naturel, am\u00e9liorant ainsi sa stabilit\u00e9 structurelle. Cela emp\u00eache la perte de couche de graphite pendant le cyclage. L&#039;halog\u00e9nation du graphite naturel r\u00e9duit \u00e9galement la r\u00e9sistance interne, augmente la capacit\u00e9 et am\u00e9liore les performances de charge-d\u00e9charge.<br>Des \u00e9tudes montrent que l&#039;effet de modification d\u00e9pend fortement du type de graphite utilis\u00e9. La simple oxydation ou halog\u00e9nation du graphite n&#039;offre qu&#039;une am\u00e9lioration limit\u00e9e des performances \u00e9lectrochimiques et ne r\u00e9pond pas aux exigences pratiques. C&#039;est pourquoi les chercheurs associent l&#039;oxydation ou l&#039;halog\u00e9nation \u00e0 un rev\u00eatement pour am\u00e9liorer les performances \u00e9lectrochimiques du graphite et obtenir de meilleurs r\u00e9sultats.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Rev\u00eatement de surface<\/h2>\n\n\n\n<p>La modification du rev\u00eatement de surface des mat\u00e9riaux d&#039;anode en graphite comprend des rev\u00eatements en carbone, en m\u00e9tal ou non m\u00e9tallique, en oxyde et en polym\u00e8re.<br>Le rev\u00eatement de surface am\u00e9liore la capacit\u00e9 r\u00e9versible, l&#039;efficacit\u00e9 coulombienne du premier cycle, les performances du cycle et les performances de charge-d\u00e9charge \u00e0 courant \u00e9lev\u00e9.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">dopage \u00e9l\u00e9mentaire<\/h2>\n\n\n\n<p>Le dopage \u00e9l\u00e9mentaire consiste \u00e0 incorporer ou \u00e0 charger intentionnellement certains m\u00e9taux ou non-m\u00e9taux dans des mat\u00e9riaux en graphite. Cela modifie la microstructure du mat\u00e9riau, am\u00e9liorant ainsi la capacit\u00e9 d&#039;insertion\/extraction de lithium de l&#039;anode en graphite.<br>Par cons\u00e9quent, il am\u00e9liore la capacit\u00e9 de stockage du lithium et la stabilit\u00e9 du cyclage du graphite. Les \u00e9l\u00e9ments non m\u00e9talliques dop\u00e9s dans les mat\u00e9riaux en graphite comprennent principalement B, N, Si, P, S, etc. Les \u00e9l\u00e9ments m\u00e9talliques comprennent Fe, Co, Ni, Cu, Zn, Sn, Ag, etc. Divers dopages compos\u00e9s sont \u00e9galement en cours de d\u00e9veloppement.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Conclusion<\/h2>\n\n\n\n<p>La technologie de modification de surface am\u00e9liore l&#039;efficacit\u00e9 du stockage et de la lib\u00e9ration des ions lithium en modifiant la structure de surface, la morphologie et les propri\u00e9t\u00e9s chimiques de l&#039;anode en graphite.<br>Le d\u00e9veloppement de cette technologie permet d\u2019am\u00e9liorer la densit\u00e9 \u00e9nerg\u00e9tique, de prolonger la dur\u00e9e de vie du cycle et d\u2019am\u00e9liorer les performances de s\u00e9curit\u00e9 des batteries lithium-ion.<\/p>\n\n\n\n<p>EPIC\u00a0<a href=\"https:\/\/www.ball-mill-classifiers.com\/fr\/categorie-produit\/ball-mill-classifier\/\">broyage \u00e0 boulets<\/a>\u00a0et les \u00e9quipements de classification peuvent \u00e9galement vous fournir des solutions exclusives pour la modification de surface du graphite, vous aidant \u00e0 r\u00e9soudre rapidement les probl\u00e8mes.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"860\" height=\"484\" src=\"https:\/\/www.ball-mill-classifiers.com\/wp-content\/uploads\/2025\/03\/EPIC-POWDER.webp\" alt=\"Epic powder\" class=\"wp-image-14159\" srcset=\"https:\/\/www.ball-mill-classifiers.com\/wp-content\/uploads\/2025\/03\/EPIC-POWDER.webp 860w, https:\/\/www.ball-mill-classifiers.com\/wp-content\/uploads\/2025\/03\/EPIC-POWDER-300x169.webp 300w, https:\/\/www.ball-mill-classifiers.com\/wp-content\/uploads\/2025\/03\/EPIC-POWDER-768x432.webp 768w, https:\/\/www.ball-mill-classifiers.com\/wp-content\/uploads\/2025\/03\/EPIC-POWDER-18x10.webp 18w, https:\/\/www.ball-mill-classifiers.com\/wp-content\/uploads\/2025\/03\/EPIC-POWDER-600x338.webp 600w\" sizes=\"(max-width: 860px) 100vw, 860px\" \/><\/figure>\n\n\n\n<div class=\"wp-block-contact-form-7-contact-form-selector\">\n<div class=\"wpcf7 no-js\" id=\"wpcf7-f14067-o1\" lang=\"zh-CN\" dir=\"ltr\" data-wpcf7-id=\"14067\">\n<div class=\"screen-reader-response\"><p role=\"status\" aria-live=\"polite\" aria-atomic=\"true\"><\/p> <ul><\/ul><\/div>\n<form action=\"\/fr\/wp-json\/wp\/v2\/posts\/14155#wpcf7-f14067-o1\" method=\"post\" class=\"wpcf7-form init\" aria-label=\"\u7559\u8a00\u8868\u5355\" novalidate=\"novalidate\" data-status=\"init\" data-trp-original-action=\"\/fr\/wp-json\/wp\/v2\/posts\/14155#wpcf7-f14067-o1\">\n<fieldset class=\"hidden-fields-container\"><input type=\"hidden\" name=\"_wpcf7\" value=\"14067\" \/><input type=\"hidden\" name=\"_wpcf7_version\" value=\"6.1.4\" \/><input type=\"hidden\" name=\"_wpcf7_locale\" value=\"zh_CN\" \/><input type=\"hidden\" 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Le premier mod\u00e8le commercial de batterie lithium-ion, d\u00e9velopp\u00e9 par Sony au Japon en 1990, associait de l&#039;oxyde de lithium-cobalt au graphite. 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