{"id":365,"date":"2023-06-13T08:31:37","date_gmt":"2023-06-13T08:31:37","guid":{"rendered":"http:\/\/math-in.net\/9imw\/?page_id=365"},"modified":"2023-06-14T09:25:29","modified_gmt":"2023-06-14T09:25:29","slug":"problema-5-2","status":"publish","type":"page","link":"https:\/\/math-in.net\/9imw\/pt\/problema-5-2\/","title":{"rendered":"Problema 5"},"content":{"rendered":"<h4><strong>Problema 5<\/strong><\/h4>\n<p><img class=\"alignnone size-medium wp-image-260\" src=\"http:\/\/math-in.net\/9imw\/wp-content\/uploads\/sites\/17\/2023\/05\/IAC3-1-300x44.png\" alt=\"\" width=\"300\" height=\"44\" srcset=\"https:\/\/math-in.net\/9imw\/wp-content\/uploads\/sites\/17\/2023\/05\/IAC3-1-200x30.png 200w, https:\/\/math-in.net\/9imw\/wp-content\/uploads\/sites\/17\/2023\/05\/IAC3-1-300x44.png 300w, https:\/\/math-in.net\/9imw\/wp-content\/uploads\/sites\/17\/2023\/05\/IAC3-1-400x59.png 400w, https:\/\/math-in.net\/9imw\/wp-content\/uploads\/sites\/17\/2023\/05\/IAC3-1.png 533w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/p>\n<p><strong>T\u00edtulo do Desafio: <\/strong>Rumo a baterias de metal de l\u00edtio mais eficientes.<\/p>\n<p><strong>Breve descri\u00e7\u00e3o do desafio: <\/strong><\/p>\n<p>As baterias de metal de l\u00edtio t\u00eam l\u00edtio met\u00e1lico como \u00e2nodo. Diferentemente das baterias de \u00edon-l\u00edtio que armazenam \u00edon-l\u00edtio, ou \u00e1tomos, nos vazios da estrutura, as baterias de metal de l\u00edtio formam apenas uma camada de l\u00edtio em um dos el\u00e9trodos: isso permite evitar o uso do material de armazenamento t\u00edpico das baterias de \u00edon-l\u00edtio e, portanto, tendo o mesmo poder de armazenamento em uma fra\u00e7\u00e3o de peso e volume. Al\u00e9m disso, os tempos de recarga dessas baterias podem, teoricamente, ser mais curtos do que os das baterias de \u00edon-l\u00edtio.<\/p>\n<p>Um dos principais problemas que impedem a implanta\u00e7\u00e3o em larga escala das baterias recarreg\u00e1veis de l\u00edtio met\u00e1lico \u00e9 sua curta vida \u00fatil, devido principalmente \u00e0 perda da efici\u00eancia coul\u00f4mbica e \u00e0 forma\u00e7\u00e3o de dendritos (estruturas em forma de \u00e1rvore) que causam curtos-circuitos no interior da bateria: \u00e0 medida que os ciclos de carga e descarga ocorrem, o l\u00edtio se deposita na superf\u00edcie formando dendritos normais \u00e0 superf\u00edcie. Este crescimento dendr\u00edtico leva as estruturas de l\u00edtio a atingir, ap\u00f3s um curto n\u00famero de ciclos, outros elementos da bateria, tornando-as in\u00fateis.<\/p>\n<p>O desafio \u00e9 modelar esses crescimentos dendr\u00edticos durante ciclos de carga\/descarga usando t\u00e9cnicas anal\u00edticas, semi-anal\u00edticas e num\u00e9ricas, e estudar se os processos de carga com alguns padr\u00f5es oscilat\u00f3rios curtos de microcarga\/descarga podem prevenir ou reduzir a forma\u00e7\u00e3o de tais estruturas dendr\u00edticas, permitindo tempos de vida muito maiores para essas baterias promissoras.<\/p>\n<p>&nbsp;<\/p>\n<p><strong>Conhecimentos de matem\u00e1tica |<\/strong>\u00a0 Os estudantes necessitam de ter alguns conhecimentso b\u00e1sicos de alguma linguagem de programa\u00e7\u00e3o como Python, C ou Fortran.<\/p>\n<p><strong>Coordenadora |<\/strong> Joan Josep Cerd\u00e0, IAC3, Espanha.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Problema 5 T\u00edtulo do Desafio: Rumo a baterias de metal [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v19.0 - 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