Description du projet
Une technologie novatrice pour améliorer le stockage en batterie
Les batteries lithium-ion, qui constituent actuellement la technologie de stockage d’énergie la plus répandue, s’appuient sur la chimie redox qui est le principe de base de ce type de stockage. Cependant, depuis 2013, un processus innovant et prometteur a été démontré, offrant une capacité de conservation de l’énergie beaucoup plus importante. Bien que, malheureusement, cette nouvelle technologie fasse encore l’objet de tests, elle est susceptible d’apporter des avantages considérables. Le projet ARPEMA, financé par le CER, vise à relever les défis associés à cette technologie en évolution en acquérant une meilleure compréhension de ses capacités. L’équipe du projet a conçu un vaste programme de recherche qui combine des méthodes expérimentales et informatiques. Cette approche permettra de concevoir des matériaux de batterie capables d’améliorer considérablement les capacités de stockage de l’énergie.
Objectif
Redox chemistry provides the fundamental basis for numerous energy-related electrochemical devices, among which Li-ion batteries (LIB) have become the premier energy storage technology for portable electronics and vehicle electrification. Throughout its history, LIB technology has relied on cationic redox reactions as the sole source of energy storage capacity. This is no longer true. In 2013 we demonstrated that Li-driven reversible formation of (O2)n peroxo-groups in new layered oxides led to extraordinary increases in energy storage capacity. This finding, which is receiving worldwide attention, represents a transformational approach for creating advanced energy materials for not only energy storage, but also water splitting applications as both involve peroxo species. However, as is often the case with new discoveries, the fundamental science at work needs to be rationalized and understood. Specifically, what are the mechanisms for ion and electron transport in these Li-driven anionic redox reactions?
To address these seminal questions and to widen the spectrum of materials (transition metal and anion) showing anionic redox chemistry, we propose a comprehensive research program that combines experimental and computational methods. The experimental methods include structural and electrochemical analyses (both ex-situ and in-situ), and computational modeling will be based on first-principles DFT for identifying the fundamental processes that enable anionic redox activity. The knowledge gained from these studies, in combination with our expertise in inorganic synthesis, will enable us to design a new generation of Li-ion battery materials that exhibit substantial increases (20 -30%) in energy storage capacity, with additional impacts on the development of Na-ion batteries and the design of water splitting catalysts, with the feasibility to surpass current water splitting efficiencies via novel (O2)n-based electrocatalysts.
Champ scientifique
- natural scienceschemical scienceselectrochemistryelectric batteries
- natural scienceschemical sciencesorganic chemistryorganic reactions
- humanitieshistory and archaeologyhistory
- natural scienceschemical sciencescatalysiselectrocatalysis
- natural sciencescomputer and information sciencescomputational science
Programme(s)
Thème(s)
Régime de financement
ERC-ADG - Advanced GrantInstitution d’accueil
75005 Paris
France