{"id":1477,"date":"2025-03-04T17:14:36","date_gmt":"2025-03-04T09:14:36","guid":{"rendered":"https:\/\/www.battery-material.com\/?p=1477"},"modified":"2025-03-04T17:21:47","modified_gmt":"2025-03-04T09:21:47","slug":"lithium-sulfide-li2s-new-opportunities-for-sulfide-all-solid-state-batteries","status":"publish","type":"post","link":"https:\/\/www.battery-material.com\/fr\/lithium-sulfide-li2s-new-opportunities-for-sulfide-all-solid-state-batteries\/","title":{"rendered":"Sulfure de lithium (Li2S) : de nouvelles opportunit\u00e9s pour les batteries tout solide au sulfure"},"content":{"rendered":"

Dans la prochaine g\u00e9n\u00e9ration de technologies avanc\u00e9es de batteries secondaires, les batteries lithium-soufre et lithium-ion sont les deux principaux syst\u00e8mes de d\u00e9veloppement. Les batteries lithium-soufre utilisent des \u00e9lectrolytes solides s\u00fbrs et ininflammables. Cela permet de r\u00e9soudre les probl\u00e8mes de s\u00e9curit\u00e9 rencontr\u00e9s dans les batteries \u00e0 \u00e9lectrolytes organiques. Les batteries lithium-soufre utilisent du lithium m\u00e9tal comme \u00e9lectrode n\u00e9gative. Elles utilisent du soufre ou du sulfure de lithium (Li2S) comme \u00e9lectrode positive. Ces batteries peuvent stocker une \u00e9nergie cinq fois sup\u00e9rieure \u00e0 celle des batteries lithium-ion classiques. Ces deux types de batteries sont devenus essentiels au d\u00e9veloppement des technologies \u00e9nerg\u00e9tiques dans le monde entier ces derni\u00e8res ann\u00e9es.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

Qu'est-ce que le sulfure de lithium (Li2S) ?<\/h2>\n\n\n\n

Le sulfure de lithium (Li2S) est essentiel \u00e0 la fabrication d'\u00e9lectrolytes solides sulfur\u00e9s (SSE). Il constitue \u00e9galement le premier choix pour l'\u00e9lectrode positive des batteries lithium-soufre. L'utilisation d'\u00e9lectrodes n\u00e9gatives comme le graphite et le silicium peut aider \u00e0 pr\u00e9venir les risques de s\u00e9curit\u00e9 li\u00e9s aux \u00e9lectrodes en m\u00e9tal lithium. Ainsi, la demande de mat\u00e9riaux Li2S a augment\u00e9 sur le march\u00e9 mondial ces derniers temps.<\/p>\n\n\n\n

Avant que les batteries lithium-soufre et sulfure \u00e0 l\u2019\u00e9tat solide ne suscitent l\u2019int\u00e9r\u00eat, le sulfure de lithium avait peu d\u2019utilisations pratiques. Peu de gens l\u2019\u00e9tudiaient \u00e0 l\u2019\u00e9poque. Le r\u00e9dacteur en chef de China Powder Network a v\u00e9rifi\u00e9 les informations. Il a d\u00e9couvert qu\u2019au 20e si\u00e8cle, seuls quelques documents chinois \u00e9voquaient le Li2S dans les batteries. Le premier \u00e9tait un rapport de recherche de l\u2019acad\u00e9micien Chen Liquan de l\u2019Institut de physique de l\u2019Acad\u00e9mie chinoise des sciences, en collaboration avec des chercheurs de l\u2019Universit\u00e9 de P\u00e9kin en 1985. Apr\u00e8s pr\u00e8s de 30 ans, vers 2015, l\u2019enthousiasme de la recherche pour le sulfure de lithium s\u2019est progressivement intensifi\u00e9. Aujourd\u2019hui, le sulfure de lithium est une \u00ab star \u00bb des batteries \u00e0 l\u2019\u00e9tat solide et des mat\u00e9riaux lithium-soufre.<\/p>\n\n\n\n

\"Structure<\/figure>\n\n\n\n

Comment pr\u00e9parer le sulfure de lithium (Li2S) ?<\/h2>\n\n\n\n

Le sulfure de lithium pur se pr\u00e9sente sous forme de cristaux blancs \u00e0 jaunes. Il a une structure antifluorite. Sa densit\u00e9 relative est de 1,66. Son point de fusion est de 938 \u00b0C et son point d'\u00e9bullition de 1\u00a0372 \u00b0C. Il se dissout facilement dans l'eau et est \u00e9galement soluble dans l'\u00e9thanol et l'acide. Cependant, il ne se dissout pas dans les alcalis. Les compos\u00e9s Li2S n'existent pas dans la nature. Ils se d\u00e9composent facilement \u00e0 l'air, ce qui conduit \u00e0 la production de gaz de sulfure d'hydrog\u00e8ne. Ce gaz a une odeur d'\u0153uf pourri.<\/p>\n\n\n\n

Contrairement au premier, les deux autres sulfures alcalins, Na2S et K2S, peuvent se m\u00e9langer \u00e0 l'eau. Ils forment des cristaux hydrat\u00e9s : Na2S\u00b79H2O et K2S\u00b75H2O. On peut obtenir leurs formes anhydres en les chauffant directement. Ces trois sulfures ont des propri\u00e9t\u00e9s chimiques tr\u00e8s similaires. Ils partagent le m\u00eame anion divalent, S2-. Cette similitude les rend utiles dans la fabrication du papier, du cuir et de la vulcanisation du caoutchouc. Le Li2S co\u00fbte beaucoup plus cher que les deux autres produits similaires. Cela s'explique principalement par le prix \u00e9lev\u00e9 du lithium, sa mati\u00e8re premi\u00e8re. De plus, la production et le stockage sont difficiles.<\/p>\n\n\n\n

Les m\u00e9thodes actuelles de fabrication du sulfure de lithium comprennent\u00a0:<\/p>\n\n\n\n

    \n
  • M\u00e9thode de broyage \u00e0 boulets<\/li>\n\n\n\n
  • M\u00e9thode du solvant<\/li>\n\n\n\n
  • M\u00e9thode \u00e0 haute temp\u00e9rature et haute pression<\/li>\n\n\n\n
  • M\u00e9thode composite directe au carbone<\/li>\n<\/ul>\n\n\n\n

    Broyage \u00e0 boulets<\/h3>\n\n\n\n

    Principe du proc\u00e9d\u00e9 :<\/strong> M\u00e9langer du soufre \u00e9l\u00e9mentaire avec du lithium m\u00e9tallique ou de l'hydrure de lithium dans une atmosph\u00e8re inerte. Ensuite, utiliser un broyeur \u00e0 boulets m\u00e9canique pour cr\u00e9er du sulfure de lithium.<\/p>\n\n\n\n

    Avantages :<\/strong> Proc\u00e9d\u00e9 simple, respectueux de l'environnement, aucun d\u00e9chet liquide g\u00e9n\u00e9r\u00e9.<\/p>\n\n\n\n

    Inconv\u00e9nients :<\/strong><\/p>\n\n\n\n

      \n
    • Co\u00fbt \u00e9lev\u00e9 des mati\u00e8res premi\u00e8res (hydrure de lithium)<\/li>\n\n\n\n
    • Temps de r\u00e9action long<\/li>\n\n\n\n
    • Faible taux de conversion<\/li>\n\n\n\n
    • Le produit contient des impuret\u00e9s telles que le polysulfure de lithium, qui sont difficiles \u00e0 purifier<\/li>\n\n\n\n
    • Choisir un \u00e9quipement industriel est un d\u00e9fi.<\/li>\n<\/ul>\n\n\n\n

      M\u00e9thode du solvant<\/h3>\n\n\n\n

      Principe du proc\u00e9d\u00e9 :<\/strong> M\u00e9langer des compos\u00e9s de lithium et de soufre dans un solvant. Cette r\u00e9action produit du sulfure de lithium. Le solvant peut \u00eatre un solvant organique ou de l'ammoniac liquide. Les solvants organiques comprennent les hydrocarbures aliphatiques, les hydrocarbures aromatiques ou les solvants \u00e0 base d'\u00e9ther. Des exemples courants sont l'\u00e9thanol, l'hexane, le tolu\u00e8ne, l'\u00e9ther, le t\u00e9trahydrofurane et l'azote m\u00e9thylpyrrolidone.<\/p>\n\n\n\n

      Avantages :<\/strong><\/p>\n\n\n\n

        \n
      • La r\u00e9action en phase liquide est termin\u00e9e.<\/li>\n\n\n\n
      • Les impuret\u00e9s sont moins susceptibles de rester.<\/li>\n\n\n\n
      • La purification du produit est facile.<\/li>\n\n\n\n
      • Aucun traitement \u00e0 haute temp\u00e9rature n'est n\u00e9cessaire.<\/li>\n\n\n\n
      • La consommation d'\u00e9nergie est faible.<\/li>\n\n\n\n
      • Le processus est simple et les conditions de travail sont faciles \u00e0 contr\u00f4ler.<\/li>\n<\/ul>\n\n\n\n

        Inconv\u00e9nients : <\/strong>Les solvants organiques peuvent prendre feu, exploser et s'\u00e9vaporer rapidement. Cela entra\u00eene une pollution importante et rend le recyclage difficile. De plus, travailler avec eux est tr\u00e8s dangereux et difficile \u00e0 g\u00e9rer.<\/p>\n\n\n\n

        M\u00e9thode \u00e0 haute temp\u00e9rature et haute pression<\/h3>\n\n\n\n

        Principe du proc\u00e9d\u00e9 : <\/strong>Dans une atmosph\u00e8re protectrice, inerte ou r\u00e9ductrice, la temp\u00e9rature et la pression \u00e9lev\u00e9es font r\u00e9agir les compos\u00e9s du lithium et du soufre. Cette r\u00e9action contribue \u00e0 la formation du sulfure de lithium.<\/p>\n\n\n\n

        Avantages : <\/strong>Le proc\u00e9d\u00e9 est simple. Il ne g\u00e9n\u00e8re aucun gaz nocif. Il utilise \u00e9galement une temp\u00e9rature et une pression \u00e9lev\u00e9es pour \u00e9viter les fuites de solvants nocifs. Cela r\u00e9duit consid\u00e9rablement le temps de pr\u00e9paration.<\/p>\n\n\n\n

        Inconv\u00e9nients :<\/strong><\/p>\n\n\n\n

          \n
        • La temp\u00e9rature et la pression \u00e9lev\u00e9es rendent le contr\u00f4le difficile.<\/li>\n\n\n\n
        • Les exigences en mati\u00e8re d'\u00e9quipement sont strictes.<\/li>\n\n\n\n
        • Le processus de r\u00e9action et le post-traitement comportent des risques accrus.<\/li>\n<\/ul>\n\n\n\n

          Proc\u00e9d\u00e9 composite direct au carbone<\/h3>\n\n\n\n

          Principe du proc\u00e9d\u00e9 : <\/strong>Le carbone peut facilement r\u00e9duire les mat\u00e9riaux. Cela nous permet d'ajouter du carbone directement lors de la fabrication du sulfure de lithium. Cela permet d'obtenir un composite sulfure de lithium\/carbone. Il pr\u00e9sente une dispersion uniforme, de solides performances et une forme contr\u00f4lable, le tout en une seule \u00e9tape.<\/p>\n\n\n\n

          Avantages :<\/strong><\/p>\n\n\n\n

            \n
          • La r\u00e9action est plus facile \u00e0 contr\u00f4ler, ce qui permet de r\u00e9soudre les probl\u00e8mes de production et de stockage caus\u00e9s par la sensibilit\u00e9 du sulfure de lithium \u00e0 l'eau et \u00e0 l'oxyg\u00e8ne.<\/li>\n\n\n\n
          • Il augmente le rendement et les performances du produit.<\/li>\n\n\n\n
          • Il simplifie le processus complexe de pr\u00e9paration des composites traditionnels sulfure de lithium\/carbone.<\/li>\n\n\n\n
          • Il am\u00e9liore la mani\u00e8re dont les mat\u00e9riaux actifs se propagent dans l\u2019\u00e9lectrode positive des batteries lithium-soufre.<\/li>\n\n\n\n
          • Il am\u00e9liore \u00e9galement les performances \u00e9lectrochimiques de ces batteries.<\/li>\n<\/ul>\n\n\n\n

            Inconv\u00e9nients :<\/strong> La technologie du proc\u00e9d\u00e9 doit \u00eatre am\u00e9lior\u00e9e. La qualit\u00e9 du produit est instable. De plus, la morphologie du mat\u00e9riau composite est difficile \u00e0 contr\u00f4ler.<\/p>\n\n\n\n

            Quelle est la difficult\u00e9 d\u2019industrialiser le sulfure de lithium (Li2S) de qualit\u00e9 batterie ?<\/h2>\n\n\n\n

            Le sulfure de lithium est une mati\u00e8re premi\u00e8re essentielle pour les \u00e9lectrolytes solides au sulfure. Le Japon, la Cor\u00e9e du Sud, les \u00c9tats-Unis et la Chine sont leaders dans la technologie des batteries. Le Japon et la Cor\u00e9e du Sud font de gros efforts pour d\u00e9velopper des batteries \u00e0 l'\u00e9tat solide \u00e0 base de soufre. Ils \u00e9laborent des plans strat\u00e9giques pour faire progresser cette technologie. Bien que toutes les entreprises encouragent vigoureusement le d\u00e9veloppement de batteries \u00e0 l'\u00e9tat solide \u00e0 base de soufre, ces derni\u00e8res ne sont pas encore industrialis\u00e9es.<\/p>\n\n\n\n

            Les principales raisons sont au nombre de deux :<\/p>\n\n\n\n

              \n
            1. Le co\u00fbt \u00e9lev\u00e9 des mati\u00e8res premi\u00e8res, notamment du sulfure de lithium.<\/li>\n\n\n\n
            2. Le probl\u00e8me d\u2019interface dans les batteries enti\u00e8rement solides \u00e0 base de soufre affecte le lien entre les \u00e9lectrodes positives et n\u00e9gatives et l\u2019\u00e9lectrolyte solide.<\/li>\n<\/ol>\n\n\n\n

              Le sulfure de lithium est important pour la fabrication d'\u00e9lectrolytes solides sulfur\u00e9s et pour les batteries lithium-soufre. Sa puret\u00e9, la taille de ses particules et sa forme sont cruciales pour les performances de la batterie. Le co\u00fbt de production est \u00e9galement essentiel pour utiliser avec succ\u00e8s le sulfure de lithium dans les batteries commerciales.<\/p>\n\n\n\n

              Les mati\u00e8res premi\u00e8res \u00e0 haut risque sont difficiles \u00e0 obtenir<\/h3>\n\n\n\n

              Les principaux mat\u00e9riaux pour le sulfure de lithium sont :<\/p>\n\n\n\n

                \n
              • Lithium m\u00e9tallique ou hydrure de lithium<\/li>\n\n\n\n
              • Gaz de sulfure d'hydrog\u00e8ne<\/li>\n\n\n\n
              • Solvants organiques<\/li>\n<\/ul>\n\n\n\n

                Le lithium m\u00e9tallique et l'hydrure de lithium peuvent \u00eatre difficiles \u00e0 trouver, et le H2S est un gaz tr\u00e8s toxique. Il est donc dangereux de le transporter, de l'utiliser et de le stocker. La plupart des solvants organiques sont des produits chimiques dangereux, inflammables ou explosifs. L'obtention et le stockage des mati\u00e8res premi\u00e8res \u00e0 base de sulfure de lithium comportent de nombreuses incertitudes et de nombreux risques.<\/p>\n\n\n\n

                La s\u00e9paration et la purification des produits de haute puret\u00e9 sont difficiles<\/h3>\n\n\n\n

                Certains fabricants d'\u00e9lectrolytes exigent d\u00e9sormais une puret\u00e9 plus \u00e9lev\u00e9e pour le sulfure de lithium. Ils ont d\u00e9fini les normes suivantes :<\/p>\n\n\n\n

                  \n
                1. La teneur en carbone doit \u00eatre de 0,1% ou moins.<\/li>\n\n\n\n
                2. La teneur en humidit\u00e9 doit \u00eatre \u2264 100 mg\/kg.<\/li>\n\n\n\n
                3. Les impuret\u00e9s m\u00e9talliques doivent \u00eatre inf\u00e9rieures \u00e0 100 mg\/kg.<\/li>\n\n\n\n
                4. La taille des particules doit \u00eatre D50\u22647 um et D90\u22642D50.<\/li>\n<\/ol>\n\n\n\n

                  Certains fabricants de sulfure de lithium doivent purifier leur produit, ce qui ajoute \u00e0 la complexit\u00e9 du processus.<\/p>\n\n\n\n

                  Le d\u00e9veloppement d\u2019\u00e9quipements sp\u00e9ciaux pour la production de sulfure de lithium est difficile<\/h3>\n\n\n\n

                  Le sulfure de lithium est un nouveau sel de lithium. Il s'agit d'une mati\u00e8re premi\u00e8re importante pour la prochaine g\u00e9n\u00e9ration de batteries \u00e0 semi-conducteurs \u00e0 haute densit\u00e9 \u00e9nerg\u00e9tique. La Chine s'efforce actuellement de transformer ce mat\u00e9riau de la production \u00e0 petite \u00e9chelle \u00e0 une utilisation industrielle compl\u00e8te. Les \u00e9quipements industriels doivent \u00eatre personnalis\u00e9s en fonction du processus et le d\u00e9veloppement des \u00e9quipements est difficile. Le syst\u00e8me de mat\u00e9riaux actuel ne parvient pas \u00e0 r\u00e9pondre aux besoins de personnalisation des \u00e9quipements industriels au sulfure de lithium. Le principal probl\u00e8me qui freine l'industrialisation du sulfure de lithium est le besoin d'\u00e9quipements sp\u00e9ciaux.<\/p>\n\n\n\n

                  <\/p>","protected":false},"excerpt":{"rendered":"

                  Dans la prochaine g\u00e9n\u00e9ration de technologies avanc\u00e9es de batteries secondaires, les batteries au lithium enti\u00e8rement solides et les batteries au lithium-soufre sont les deux principaux syst\u00e8mes de d\u00e9veloppement. Les batteries enti\u00e8rement solides au sulfure utilisent des \u00e9lectrolytes solides s\u00fbrs et ininflammables. Cela permet de r\u00e9soudre les probl\u00e8mes de s\u00e9curit\u00e9 rencontr\u00e9s dans les batteries \u00e0 \u00e9lectrolytes organiques. Les batteries au lithium-soufre utilisent du lithium m\u00e9tal comme \u00e9lectrode n\u00e9gative. Elles utilisent du soufre ou du sulfure de lithium [\u2026]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1477","post","type-post","status-publish","format-standard","hentry","category-graphite-anode-material-processing"],"yoast_head":"\nLithium sulfide (Li2S): new opportunities for sulfide all-solid-state batteries - Battery material powder-making equipment from China<\/title>\n<meta name=\"description\" content=\"Lithium sulfide (Li2S) is essential for making sulfide solid electrolytes (SSE). 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