Liten is a major European research institute and a driving force behind the development of the sustainable energy technologies of the future. The institute is spearheading the EU’s efforts to limit dependency on fossil fuels and reduce greenhouse gas emissions in three key areas: renewable energy, energy efficiency/storage and development of materials.
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Liten's research teams work across a vast portfolio of renewable energy technologies. Cutting-edge photovoltaic technologies are developed at INES, the French National centre for solar research and R&D with Hydrogen and Biomass activities being managed from the LITEN's main site in Grenoble, Rhone-Alpes.
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News | New technologies
One of the factors that can affect lithium-ion battery lifespans is lithium plating—the formation of metal lithium on the graphite negative electrode. Researchers at Liten, a CEA Tech institute, worked with CEA institute IRIG to characterize the lithium using NMR spectroscopy. The method developed aims to detect the formation of metal lithium in real time to provide a deeper understanding of the mechanisms that underpin the degradation of the negative electrode.
Until now, this type of characterization has been completed ex situ on samples of electrodes taken post mortem. However, lithium plating continues to evolve even after operation of the battery element ceases. The researchers developed a laboratory cell with a design similar to that used in commercially-available batteries but scaled down so that it could be inserted into the NMR coil, which was also modified for the experiment.
Several in operando tests were completed in a variety of conditions. The encouraging results obtained will provide new insights into how metal lithium is formed on the negative electrode so that charge protocols capable of limiting the phenomenon can be determined. This information will then be integrated into battery management systems (BMS) with the goal of extending battery lifespans or used to design electrodes less sensitive to this particular degradation mechanism.
CEA is a French government-funded technological research organisation in four main areas: low-carbon energies, defense and security, information technologies and health technologies. A prominent player in the European Research Area, it is involved in setting up collaborative projects with many partners around the world.