{"id":464511,"date":"2024-11-03T23:52:45","date_gmt":"2024-11-03T22:52:45","guid":{"rendered":"https:\/\/www.ecinews.fr\/?p=464511"},"modified":"2024-11-03T23:52:45","modified_gmt":"2024-11-03T22:52:45","slug":"amelioration-de-la-cathode-dune-batterie-potassium-ion","status":"publish","type":"post","link":"https:\/\/www.ecinews.fr\/fr\/amelioration-de-la-cathode-dune-batterie-potassium-ion\/","title":{"rendered":"Am\u00e9lioration de la cathode d’une batterie potassium-ion"},"content":{"rendered":"

Une \u00e9quipe de chercheurs europ\u00e9ens affirment avoir r\u00e9alis\u00e9 une perc\u00e9e qui pourrait contribuer \u00e0 la mise au point d’une nouvelle g\u00e9n\u00e9ration de batteries potassium-ion.<\/span><\/h3>\n

L’\u00e9quipe internationale dirig\u00e9e par des chimistes de l’universit\u00e9 de Glasgow, en \u00c9cosse, et des experts en essais de batteries de l’institut Helmholtz d’Ulm, en Allemagne, a utilis\u00e9 un mat\u00e9riau compos\u00e9 de chrome et de s\u00e9l\u00e9nium dans une batterie potassium-ion.<\/p>\n

Les cellules d’accumulateurs potassium-ion \u00e0 faible co\u00fbt et \u00e0 charge rapide se rapprochent ainsi d’une alternative viable aux cellules lithium-ion pour les syst\u00e8mes de stockage d’\u00e9nergie (ESS).<\/p>\n

Certaines des conceptions actuelles les plus performantes pour les batteries potassium-ion utilisent des cathodes fabriqu\u00e9es \u00e0 partir de blanc de Prusse, qui est \u00e9galement utilis\u00e9 pour les cellules des batteries sodium-ion. Cependant, le blanc de Prusse doit \u00eatre m\u00e9lang\u00e9 avec du carbone pour augmenter sa conductivit\u00e9 et obtenir les meilleurs r\u00e9sultats. De son c\u00f4t\u00e9, Group1, aux \u00c9tats-Unis, a pr\u00e9sent\u00e9 au d\u00e9but de l’ann\u00e9e une cellule de batterie potassium-ion \u00e9galement\u00a0 bas\u00e9e sur le blanc de Prusse dans un format cylindrique 18650.<\/p>\n

En revanche, la cathode conductrice en s\u00e9l\u00e9niure de chrome permet d’obtenir des performances \u00e9lev\u00e9es avec moins de 10 % de carbone. Le prototype a une capacit\u00e9 de 125 milliamp\u00e8res-heure par gramme, tr\u00e8s proche de sa capacit\u00e9 th\u00e9orique maximale de 127 milliamp\u00e8res-heure par gramme.<\/p>\n

Une structure en couches permet aux ions potassium de se d\u00e9placer plus facilement entre les couches pendant la charge et la d\u00e9charge. Cela permet \u00e0 la batterie de conserver 85 % de sa capacit\u00e9 dans des conditions de laboratoire, m\u00eame lorsqu’elle est charg\u00e9e et d\u00e9charg\u00e9e \u00e0 grande vitesse.<\/p>\n

\u00ab\u00a0Les batteries lithium-ion, tr\u00e8s performantes, sont \u00e0 ce jour les plus utilis\u00e9es dans tous les domaines. Cependant, le potassium est un mat\u00e9riau beaucoup plus abondant, et les batteries potassium-ion ont un grand potentiel en tant que m\u00e9thode alternative de stockage et d’acheminement de grandes quantit\u00e9s d’\u00e9lectricit\u00e9. L’adoption de batteries potassium-ion \u00e0 des fins de stockage stationnaire pourrait permettre de lib\u00e9rer les ressources en lithium pour les utiliser \u00e0 l’avenir dans des applications mobiles plus gourmandes en \u00e9nergie\u00a0\u00bb, a d\u00e9clar\u00e9 le Dr Alexey Ganin, chercheur \u00e0 l’\u00e9cole de chimie de l’universit\u00e9 de Glasgow et chef du groupe Glasgow ElectroChemistry on Solids (GECOS)..<\/p>\n

\u00ab\u00a0Ces r\u00e9sultats sont prometteurs, mais nous pensons que les performances de la batterie pourraient \u00eatre encore am\u00e9lior\u00e9es avec le bon \u00e9lectrolyte. Les \u00e9lectrolytes des batteries lithium-ion peuvent \u00eatre achet\u00e9s dans le commerce, mais des travaux suppl\u00e9mentaires sont n\u00e9cessaires pour affiner leurs performances . Nous souhaitons nous associer \u00e0 des experts en robotique qui peuvent nous aider \u00e0 tester les milliers de combinaisons chimiques potentielles pour trouver le meilleur candidat possible \u00e0 utiliser dans notre batterie\u00a0\u00bb, a d\u00e9clar\u00e9 M. Ganin.<\/p>\n

La prochaine \u00e9tape pour l’\u00e9quipe consiste \u00e0 poursuivre les recherches afin d’identifier un \u00e9lectrolyte qui permettra lors des prochains perfectionnements de la conception de la batterie potassium-ion d’am\u00e9liorer les performances.<\/p>\n

Des chercheurs de l’universit\u00e9 d’Ulm, de l’institut de technologie de Karlsruhe, de l’universit\u00e9 du Kent, de l’institut catalan de nanoscience et de nanotechnologie et de l’ICREA sont \u00e9galement partie prenante.<\/p>\n

Reversible K-Ion Intercalation in CrSe2 Cathodes for Potassium-Ion Batteries : Combined Operando PXRD and DFT studies<\/a> est publi\u00e9 dans Journal of Materials Chemistry A.<\/p>\n

www.glasgow.ac.uk<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Une \u00e9quipe de chercheurs europ\u00e9ens affirment avoir r\u00e9alis\u00e9 une perc\u00e9e qui pourrait contribuer \u00e0 la mise au point d’une nouvelle g\u00e9n\u00e9ration de batteries potassium-ion. L’\u00e9quipe internationale dirig\u00e9e par des chimistes de l’universit\u00e9 de Glasgow, en \u00c9cosse, et des experts en essais de batteries de l’institut Helmholtz d’Ulm, en Allemagne, a utilis\u00e9 un mat\u00e9riau compos\u00e9 de […]<\/p>\n","protected":false},"author":11,"featured_media":464446,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[883],"tags":[1978,3683],"domains":[47],"ppma_author":[3640,1143],"class_list":["post-464511","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technologies","tag-batteries","tag-materiaux-fr","domains-electronique-eci"],"acf":[],"yoast_head":"Am\u00e9lioration de la cathode d'une batterie potassium-ion ...<\/title>\n<meta name=\"description\" content=\"une perc\u00e9e qui pourrait contribuer \u00e0 la mise au point d'une nouvelle g\u00e9n\u00e9ration de batteries potassium-ion.\" 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