{"id":4752,"date":"2025-10-27T14:28:13","date_gmt":"2025-10-27T06:28:13","guid":{"rendered":"https:\/\/www.powdergrindingmill.com\/?p=4752"},"modified":"2025-10-27T14:28:15","modified_gmt":"2025-10-27T06:28:15","slug":"from-niche-to-premium-the-renaissance-of-lithium-iron-phosphate-via-ferrous-oxalate-route-in-power-batteries","status":"publish","type":"post","link":"https:\/\/www.powdergrindingmill.com\/es\/from-niche-to-premium-the-renaissance-of-lithium-iron-phosphate-via-ferrous-oxalate-route-in-power-batteries\/","title":{"rendered":"De nicho a premium: El renacimiento del fosfato de hierro y litio a trav\u00e9s de la ruta de oxalato ferroso en bater\u00edas de potencia"},"content":{"rendered":"

La ruta del oxalato de hierro en el desarrollo de materiales de c\u00e1todo de fosfato de hierro y litio (LFP) ha experimentado en realidad un viaje dram\u00e1tico de ser reemplazada y luego revivida. Una vez la corriente principal en la industria temprana, fue marginada debido a sus propias deficiencias y a la competencia de procesos emergentes. Sin embargo, en los \u00faltimos a\u00f1os, ha recuperado su posici\u00f3n en el mercado de bater\u00edas de potencia de alta gama aprovechando sus ventajas \u00fanicas en densidad de compactaci\u00f3n alta y rendimiento de carga r\u00e1pida.<\/p>\n\n\n\n

La era del dominio del proceso de oxalato de hierro<\/strong><\/h2>\n\n\n\n

Ya en 2017, el m\u00e9todo de oxalato de hierro segu\u00eda siendo el proceso principal para la producci\u00f3n de Fosfato de Hierro y Litio. La ruta b\u00e1sica del proceso y la ecuaci\u00f3n general de reacci\u00f3n se muestran en la Figura 1. Dependiendo de las fuentes de litio y f\u00f3sforo utilizadas, el proceso implica dos mecanismos principales de reacci\u00f3n (Ecuaciones 1 y 2), siendo el proceso inicial principalmente el que sigue la Ecuaci\u00f3n 1.<\/p>\n\n\n\n

\"Ruta
Ruta de proceso b\u00e1sica para fosfato de hierro y litio mediante m\u00e9todo de oxalato ferroso<\/figcaption><\/figure>\n\n\n\n

La ruta del proceso para producir Fosfato de Hierro y Litio utilizando oxalato ferroso parece sencilla, pero la clave de la calidad del producto reside en los detalles de cada etapa.<\/p>\n\n\n\n

Selecci\u00f3n y control de materias primas<\/strong><\/strong><\/h3>\n\n\n\n

cURL Network connection lost.<\/p>\n\n\n\n

Tradicionalmente, el carbonato de litio se utilizaba com\u00fanmente como fuente de litio. En los \u00faltimos a\u00f1os, se ha adoptado cada vez m\u00e1s el dihidrogenofosfato de litio, ya que proporciona tanto las fuentes de litio como de f\u00f3sforo, haciendo que la reacci\u00f3n sea m\u00e1s directa. En segundo lugar, su alta reactividad y su bajo temperatura de descomposici\u00f3n ayudan a reducir la temperatura de sinterizaci\u00f3n y a mejorar la consistencia del producto.<\/p>\n\n\n\n

Las fuentes de carbono se seleccionan en funci\u00f3n de su capacidad para formar una red de carbono conductor altamente grafitizada tras su descomposici\u00f3n, como la glucosa, la sacarosa y el \u00e1cido c\u00edtrico.<\/p>\n\n\n\n

Control del proceso de calcinaci\u00f3n<\/strong><\/strong><\/h3>\n\n\n\n

Este proceso generalmente emplea un m\u00e9todo de sinterizaci\u00f3n en dos etapas: la primera etapa implica un pre-sinterizado a baja temperatura (~400\u00b0C) para una descomposici\u00f3n suficiente de las materias primas, y la segunda etapa implica una cristalizaci\u00f3n a alta temperatura (~600-750\u00b0C).<\/p>\n\n\n\n

La etapa de pre-sinterizaci\u00f3n implica principalmente la descomposici\u00f3n del oxalato ferroso y los fosfatos: el oxalato ferroso pierde su agua de cristalizaci\u00f3n y se descompone en \u00f3xido ferroso altamente reactivo (FeO), liberando grandes cantidades de CO y CO\u2082. El gas reductor CO forma un \"escudo protector\" dentro del sistema de reacci\u00f3n, evitando eficazmente la oxidaci\u00f3n de Fe\u00b2\u207a a Fe\u00b3\u207a y tambi\u00e9n inhibiendo el crecimiento excesivo de las part\u00edculas del producto final. Cuando se utiliza fosfato diam\u00f3nico como fuente de f\u00f3sforo, se descompone durante la pre-sinterizaci\u00f3n, liberando gas de amon\u00edaco y \u00e1cido fosf\u00f3rico.<\/p>\n\n\n\n

Al controlar la temperatura y el tiempo de pre-sinterizaci\u00f3n, los precursores de cristales de fosfato de hierro y litio pueden formarse a temperaturas relativamente bajas. Los gases liberados ayudan a eliminar impurezas de las materias primas, mientras inhiben la aglomeraci\u00f3n de part\u00edculas y el crecimiento de cristales, facilitando la producci\u00f3n de LFP con alta cristalinidad, alta pureza y part\u00edculas uniformes en la siguiente etapa de calcinaci\u00f3n a alta temperatura.<\/p>\n\n\n\n

En la zona de altas temperaturas, el FeO altamente reactivo entra en contacto con las fuentes de litio y f\u00f3sforo, someti\u00e9ndose a una reacci\u00f3n en estado s\u00f3lido para formar n\u00facleos cristalinos de LFP. Finalmente, a medida que la temperatura aumenta y el tiempo de mantenimiento se prolonga, estos n\u00facleos crecen gradualmente, formando fosfato de hierro y litio de tipo olivino con cristalinidad completa y estructura estable.<\/p>\n\n\n\n

Durante el proceso de sinterizaci\u00f3n, la fuente de carbono org\u00e1nico sufre pir\u00f3lisis para formar un recubrimiento de carbono amorfo en la superficie de las part\u00edculas de LFP, mejorando significativamente la conductividad el\u00e9ctrica del material.<\/p>\n\n\n\n

Este proceso ofreci\u00f3 bajos costos de fuente de hierro, un flujo de proceso relativamente sencillo, inversi\u00f3n en equipos y operaci\u00f3n\/mantenimiento, convirti\u00e9ndolo en el proceso principal en los primeros d\u00edas de la tecnolog\u00eda de s\u00edntesis de LFP.<\/p>\n\n\n\n

\u00bfPor qu\u00e9 se reemplaz\u00f3 la ruta del oxalato de hierro?<\/strong><\/h2>\n\n\n\n

Entre 2017 y 2022, la industria de las bater\u00edas de energ\u00eda experiment\u00f3 un crecimiento explosivo. La demanda de consistencia en los materiales y protecci\u00f3n ambiental aument\u00f3 de repente. En este contexto, las debilidades inherentes del m\u00e9todo de fase s\u00f3lida de oxalato de hierro (poca consistencia, dificultad para escalar) se vieron amplificadas. La ruta de fosfato de hierro, con su excelente consistencia del producto, proceso de producci\u00f3n m\u00e1s respetuoso con el medio ambiente y rendimiento general m\u00e1s adecuado a las demandas de las bater\u00edas de energ\u00eda en ese momento, se convirti\u00f3 r\u00e1pidamente en la corriente principal del mercado, alcanzando en su pico aproximadamente el 70% del mercado. En contraste, la cuota de la ruta de oxalato de hierro se redujo gradualmente a cifras de un solo d\u00edgito.<\/p>\n\n\n\n

Adem\u00e1s, la densidad de compactaci\u00f3n de los productos de LFP producidos mediante el proceso temprano de oxalato de hierro no era a\u00fan alta, lo que llev\u00f3 a una percepci\u00f3n generalizada en la industria durante este per\u00edodo de que los materiales producidos por la ruta de fosfato de hierro pod\u00edan alcanzar con mayor facilidad una mayor densidad de compactaci\u00f3n (\u22652,4 g\/cm\u00b3).<\/p>\n\n\n\n

Desde la perspectiva del equipo y del medio ambiente, el m\u00e9todo de oxalato f\u00e9rrico produce CO y gas de amon\u00edaco durante la sinterizaci\u00f3n. El CO es t\u00f3xico y requiere tratamiento. El NH\u2083 es corrosivo, corrosiona severamente los hornos y las tuber\u00edas, lo que aumenta los costes de mantenimiento del equipo y el tiempo. En cambio, los productos gaseosos del proceso de sinterizaci\u00f3n del m\u00e9todo de fosfato de hierro son principalmente vapor de agua, lo que hace que el tratamiento de los gases de desecho sea m\u00e1s sencillo, m\u00e1s amigable con el equipo de producci\u00f3n y con menor presi\u00f3n ambiental.<\/p>\n\n\n\n

En resumen, el reemplazo del proceso durante esta etapa fue un caso t\u00edpico de \"la demanda industrial impulsando la iteraci\u00f3n de la ruta tecnol\u00f3gica\", resultado de la din\u00e1mica del mercado en una fase espec\u00edfica de desarrollo.<\/p>\n\n\n\n

El resurgir de la ruta del oxalato de hierro<\/strong><\/h2>\n\n\n\n

El regreso de la ruta del oxalato de hierro no es simplemente una repetici\u00f3n del proceso antiguo; m\u00e1s bien, sus ventajas principales se han reactivado bajo nuevas demandas del mercado y avances tecnol\u00f3gicos. Despu\u00e9s de 2022, la popularidad de los veh\u00edculos de energ\u00eda nueva aument\u00f3 significativamente, y la \u201ccarga lenta\u201d se convirti\u00f3 en un punto cr\u00edtico en la experiencia del usuario. La demanda del mercado de bater\u00edas de potencia capaces de realizar una \u201ccarga ultra r\u00e1pida\u201d (por ejemplo, 400 km de autonom\u00eda en 10 minutos) se dispar\u00f3.<\/p>\n\n\n\n

Aunque su cuota de mercado fue en alg\u00fan momento comprimida, el m\u00e9todo del oxalato de hierro no fue completamente abandonado por el mercado. Como precursor de los materiales LFP, fue el primero en lograr avances en la producci\u00f3n de LFP con alta densidad de compactaci\u00f3n. Las iteraciones tecnol\u00f3gicas superaron las limitaciones iniciales del proceso del oxalato de hierro en cuanto a compactaci\u00f3n del producto, seguridad en la producci\u00f3n y costos de producci\u00f3n.<\/p>\n\n\n\n

Por ejemplo, Fulin Precision Industry adopt\u00f3 reactores de tubo en espiral + reactores de retardo con calefacci\u00f3n el\u00e9ctrica. A trav\u00e9s de un control preciso de la temperatura, la adici\u00f3n de dispersantes y procesos automatizados, mejoraron significativamente la pureza del producto (\u226599.5%) y la uniformidad del tama\u00f1o de part\u00edcula, reduciendo los costos en un 20%. Pengbo New Materials tambi\u00e9n es l\u00edder en la preparaci\u00f3n dom\u00e9stica de LFP mediante el m\u00e9todo del oxalato de hierro. A trav\u00e9s de controles especiales, logran una mezcla efectiva de part\u00edculas grandes y peque\u00f1as, rellenando los espacios entre las part\u00edculas de LFP para mejorar la densidad de compactaci\u00f3n. Combinado con la dosificaci\u00f3n de iones met\u00e1licos especiales, esto resulta en LFP con resistividad en polvo muy baja. Cuando se aplica en bater\u00edas de potencia, permite tasas m\u00e1s altas, satisfaciendo las crecientes demandas de carga r\u00e1pida de los veh\u00edculos de energ\u00eda nueva.<\/p>\n\n\n\n

Por lo tanto, para que los procesos de producci\u00f3n de LFP permanezcan invencibles en una competencia feroz, las empresas relacionadas deben seguir de cerca las tendencias del mercado, arraigarse en la innovaci\u00f3n tecnol\u00f3gica continua, basarse en un control extremo de costos y utilizar la construcci\u00f3n de un ecosistema industrial robusto como su foso.<\/p>","protected":false},"excerpt":{"rendered":"

La ruta del oxalato de hierro en el desarrollo de materiales de c\u00e1todo de fosfato de hierro y litio (LFP) ha experimentado en efecto un viaje dram\u00e1tico de ser reemplazada y luego [\u2026]<\/p>","protected":false},"author":1,"featured_media":4753,"comment_status":"closed","ping_status":"open","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":"","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 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