New Publication by the Advanced Materials Group at FRM II on Lithium Loss Mechanisms in NCA||Si Cells

In a recent study, the Advanced Materials Group at FRM II demonstrates that during cyclic aging of NCA||Si cells, lithium is lost from the cathode and remains trapped in the silicon-rich anode. Operando neutron diffraction and prompt gamma activation analysis (PGAA) confirm the structural changes and lithium redistribution—providing important insights into degradation mechanisms in lithium-ion batteries.

Understanding the lithium loss in 5 Ah multilayer pouch cells with silicon-dominant anodes and NCA cathodes during cyclic aging / Thien An Pham, Sven Friedrich, Alessandro Sommer, Ivana Pivarníková, Christophe Didier, Boglárka Maróti, Andreas Jossen, Vanessa K. Peterson, Peter Müller-Buschbaum, Ralph Gilles / Journal of Power Sources, 2025, 654, 237769 – DOI: 10.1016/j.jpowsour.2025.237769