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opeRando chEmical spAce- and time-resoLved quantification of Solid Electrolyte Interphase in hard carbon anode for sustainable sodium-ion batteries

Description du projet

Observer en temps réel le comportement des électrolytes aux interfaces des électrodes

Les batteries sodium-ion sont une alternative peu coûteuse et durable aux batteries lithium-ion largement utilisées. Financé par le programme Actions Marie Skłodowska-Curie, le projet REALSEI entend détecter en temps réel la formation d’interphase d’électrolyte solide à la surface de l’anode à partir de la réduction électrochimique de l’électrolyte. Ce processus qui affecte négativement la stabilité à long terme des batteries sodium-ion reste peu exploré. Le projet prévoit de concevoir des techniques complètes de caractérisation de surface résolues dans le temps et dans l’espace en s’appuyant sur l’utilisation de l’imagerie par rayons X synchrotron à haute résolution.

Objectif

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.

Coordinateur

UNIVERSITA DEGLI STUDI DI ROMA LA SAPIENZA
Contribution nette de l'UE
€ 183 473,28
Adresse
Piazzale aldo moro 5
00185 Roma
Italie

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Région
Centro (IT) Lazio Roma
Type d’activité
Higher or Secondary Education Establishments
Liens
Autres sources de financement
€ 0,00