An innovative lithium-ion battery anode

In research conducted for the EU Sinbat project, Irig is pulling out all the stops—electron microscopy, MRI, X-ray diffraction, synchrotron, and neutron scattering techniques—to characterize an innovative lithium-ion battery anode. The anode’s revolutionary composition includes active domains of amorphous silicon and FeSi2 nanoparticles in a graphite matrix.

The silicon increases the anode’s capacity to incorporate lithium and, as a result, the energy storage density. But it also triples in volume during charging, which can cause more rapid anode degradation. The anode developed by CEA-Liten and Varta, also a partner on the project, is made from a nanostructured material developed by 3M. This material effectively limits degradation. After 700 cycles, the anode still has 70% of its original capacity.

Contact: pierre-henri.jouneau@cea.fr

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