Descripción del proyecto
Captación en tiempo real del comportamiento de los electrolitos en las interfaces de los electrodos
Las baterías de iones de sodio constituyen una alternativa sostenible y de bajo coste a las baterías de iones de litio, de uso generalizado. El objetivo del proyecto REALSEI, financiado por las Acciones Marie Skłodowska-Curie, es detectar en tiempo real la formación de las interfases de electrolitos sólidos en la superficie del ánodo a partir de la reducción electroquímica del electrolito. Este proceso, que perjudica a la estabilidad a largo plazo de las baterías de iones de sodio, todavía no se ha estudiado en detalle. El proyecto tiene la intención de definir técnicas integrales de caracterización de superficies con resolución tanto espacial como temporal, basadas en el uso de imagenología de rayos X sincrotrón de alta resolución.
Objetivo
The goal of REALSEI is to visualize for the first time in real-time the Solid Electrolyte Interphase formation at the hard-carbon (HC) anode in a Na-ion battery (NIB). Local electrochemical processes occurring at the solid-liquid interface of Na-ion batteries are currently largely unexplored. To keep global warming around 2.7°C by 2100, the installed global grid energy storage capacity needs to be tripled by 2050. A technological breakthrough is required to meet this challenge: we need a low cost and sustainable alternative to Li-ion batteries. Thanks to recent advances, the so-called ‘beyond-lithium’ batteries (BLB) such as K+ and Na+ based systems could be an everyday reality. Bio-waste mesoporous hard carbon (BHC) is one of the most promising anode materials as a universal ion host for BLBs. The use of BHC as a low-cost and recycled solution in BLBs might provide the breakthrough required and give rise to the next generation of batteries. However, uncontrolled SEI formation limits the large-scale application of BHC in BLBs, in particular for Na-ion batteries (NIBs), the most mature and promising. For NIBs, the SEI is still an unresolved issue that limits its long-term stability. REALSEI wants to establish a comprehensive operando time- and space- resolved characterization methodology to transit from bulk (transmission mode) to surface analytical characterization (grazing incidence mode) based on lab and synchrotron high-resolution X-ray techniques which will results for the first time in a comprehensive visualization and quantification of the species forming the SEI in real-time on HC. REALSEI will apply principles of physics and electrochemistry and its results will have substantial scientific, technological, and societal impact.
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MSCA-IF - Marie Skłodowska-Curie Individual Fellowships (IF)Coordinador
00185 Roma
Italia