{"id":274,"date":"2010-11-22T16:28:07","date_gmt":"2010-11-22T16:28:07","guid":{"rendered":"http:\/\/blogs.thesocialmedia.com\/leblogenergie\/2010\/11\/22\/toyota-presente-un-element-daccumulateur-avec-14-volts-de-tension\/"},"modified":"2012-07-12T12:22:17","modified_gmt":"2012-07-12T12:22:17","slug":"toyota-presente-un-element-daccumulateur-avec-14-volts-de-tension","status":"publish","type":"post","link":"https:\/\/blogs.thesocialmedia.com\/leblogenergie\/2010\/11\/22\/toyota-presente-un-element-daccumulateur-avec-14-volts-de-tension\/","title":{"rendered":"Toyota pr\u00e9sente un \u00e9l\u00e9ment d’accumulateur \u00e0 \u00e9lectrolyte solide de 16 Volts de tension"},"content":{"rendered":"

L’utilisation d’\u00e9lectrolytes solides conducteurs d’ions Li+ ou Na+ est une des voies d’avenir pour d\u00e9finir des accumulateurs dont la tension ne sera plus limit\u00e9e par les r\u00e9actions parasites d’\u00e9lectrolyse des solvants ou d’oxydation des anions en solution. Des oxydes peuvent se comporter comme des \u00e9lectrolytes solides: on conna\u00eet depuis des d\u00e9cennies l’alumine b\u00eata des accumulateurs sodium-soufre qui est un bon conducteur ionique vers les 350\u00b0C, le sodium liquide lors de la d\u00e9charge est oxyd\u00e9 en ions Na+ qui migrent dans le tube d’alumine pour aller former du sulfure de sodium dans le compartiment contenant le soufre qui est r\u00e9duit. Depuis de nombreuses ann\u00e9es les scientifiques travaillent aussi sur divers sulfures dont certains pr\u00e9sentent la particularit\u00e9 d’\u00eatre de bons conducteurs d’ions Li+ \u00e0 temp\u00e9rature ambiante. On se reportera par exemple aux travaux remarquables sur le sujet d’Akitoshi Hayashi de l’Universit\u00e9 d’Osaka qui obtient des c\u00e9ramiques Li7P3S11 trait\u00e9es thermiquement de bonne conductivit\u00e9 ionique. Il parle de cristaux superioniques (LIRE<\/a>).<\/p>\n

Ces travaux acad\u00e9miques semblent aujourd’hui entrer dans une phase plus aval de d\u00e9veloppement puisque dans le Nikkei Electronics, c’est au tour de Toyota de pr\u00e9senter un \u00e9l\u00e9ment de 16 Volts constitu\u00e9 d’un empilement de 4 \u00e9lectrodes bipolaires LiCoO2-Graphite, s\u00e9par\u00e9es entre elles par trois couches d’\u00e9lectrolyte solide (FIG.). Une des difficult\u00e9s importantes est d’assurer la continuit\u00e9 de conduction ionique de l’ion Li+ entre la mati\u00e8re \u00e9lectrochimiquement active (LiCoO2 dans ce cas) et le s\u00e9parateur<\/p>\n

\"Toyota-16V-cell\"<\/a><\/p>\n

Il y a l\u00e0 toute une nouvelle voie de d\u00e9veloppement de batteries beaucoup plus s\u00fbres car exemptes d’\u00e9lectrolytes inflammables et compos\u00e9es de modules de forte capacit\u00e9 compos\u00e9s d’\u00e9l\u00e9ments mis en parall\u00e8le pour r\u00e9duire la densit\u00e9 de courant. Ces modules seront ensuite assembl\u00e9s en s\u00e9rie pour obtenir des batteries de tensions 10 \u00e0 20 fois plus \u00e9lev\u00e9es.<\/p>\n

LIRE<\/a> le bref mais passionnant papier reportant ces premiers essais.<\/p>\n

Le 22 Novembre 2010<\/p>\n

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

L’utilisation d’\u00e9lectrolytes solides conducteurs d’ions Li+ ou Na+ est une des voies d’avenir pour d\u00e9finir des accumulateurs dont la tension ne sera plus limit\u00e9e par les r\u00e9actions parasites d’\u00e9lectrolyse des solvants ou d’oxydation des anions en solution. Des oxydes peuvent se comporter comme des \u00e9lectrolytes solides: on conna\u00eet depuis des d\u00e9cennies l’alumine b\u00eata des accumulateurs […]<\/p>\n","protected":false},"author":341,"featured_media":22348,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5,7],"tags":[],"class_list":["post-274","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites","category-vehicules-electriques"],"yoast_head":"\nToyota pr\u00e9sente un \u00e9l\u00e9ment d'accumulateur \u00e0 \u00e9lectrolyte solide de 16 Volts de tension - leblogenergie.com<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blogs.thesocialmedia.com\/leblogenergie\/2010\/11\/22\/toyota-presente-un-element-daccumulateur-avec-14-volts-de-tension\/\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:title\" content=\"Toyota pr\u00e9sente un \u00e9l\u00e9ment d'accumulateur \u00e0 \u00e9lectrolyte solide de 16 Volts de tension - leblogenergie.com\" \/>\n<meta name=\"twitter:description\" content=\"L’utilisation d’\u00e9lectrolytes solides conducteurs d’ions Li+ ou Na+ est une des voies d’avenir pour d\u00e9finir des accumulateurs dont la tension ne sera plus limit\u00e9e par les r\u00e9actions parasites d’\u00e9lectrolyse des solvants ou d’oxydation des anions en solution. 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