[pfdietz]

This article seems to confuse lithium-ion and lithium-metal batteries. Lithium-ion batteries intercalcate lithium ions into pre-existing electrodes and that doesn't form dendrites. Dendrites are a phenomenon of lithium-metal batteries, where lithium ions tend to be reduced to metal at the tips of the dendrites.

You can get lithium metal forming on lithium-ion electrodes, which could go on to form dendrites, but the failure there is the metal formation, not the dendrite formation.