Electrochemical energy storage via Li(Na)-ion batteries: Recent achievements and future challenges

Chimie du Solide-Energie, FRE 3677, Collège de France, 11 Place Marcelin Berthelot, 75231 Paris Cedex 05, France
Réseau sur le Stockage Electrochimique de l’Energie (RS2E), FR CNRS 3459, 80039 Amiens, France * jean-marie.tarascon@college-de-france.fr

Rechargeable lithium ion batteries, because of their high energy density, have conquered most of today’s portable electronics and are the systems of choice for powering electric vehicles and providing load-leveling for mass storage of renewable energy. Therefore, for this to happen, materials with higher energy densities while being sustainable, scalable, safe and low cost must be developed. The challenges for chemists are enormous. They call for new materials, new concepts as well as new battery chemistries. The presentation will address these different aspects. Firstly, regarding new concepts, we will show how the discovery of a reversible Li-driven anionic redox process among Li-rich layered oxides represents a transformational approach for creating materials with exacerbated capacities. Secondly, concerning sustainability, our new findings with the Na-ion chemistry which enlists novel materials design together with the assembly of 18650 prototypes will be presented. Lastly, the future aspects of battery research, as personally perceived, will be shared.