Lithium Electrode Morphology during Cycling in Lithium Cells

Lithium electrode surface morphologies during cycling were measured in and electrolytes. Particulate and needle‐like Li were observed on the Li electrode after cycling. Although the particulate Li could be stripped during discharge, much of the needle‐like Li remained. It appears that the needle‐like Li tends to become "dead‐Li" and is responsible for the loss of cycling of lithium electrodes.