Why electrodes in lithium-ion batteries fail

A recent study at INAC confirmed what scientists had already suspected: the main reason why electrodes in lithium-ion batteries fail is because the lithium accumulates and gets “stuck”—no longer playing its role in charge transfer.
The scientists tested their hypothesis using NMR, and designed their experiments so that the iron in the material would not scramble the NMR spectra on the samples. While these experiments confirmed the reason for electrode failure, the NMR data cannot currently be used to predict whether a sample will be successful before cycling.
This study also allowed scientists at Liten to test different electrode materials from different suppliers.

Contact: michel.bardet@cea.fr

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