Fig. 6. Organisation of electrode unrolling (top, middle, bottom) and analysis of the lithium distribution in the Li_xMnO₂ electrode during discharging using neutron tomography data.

The analysis of the lithium intercalation in the Li_xMnO₂ electrode is divided in four sections, the top, middle, bottom and overall part. a shows the pristine neutron tomogram divided in the studied parts. b displays the unrolled and over the thickness averaged electrodes of the pristine (CR2-00), partly discharged to −225.71 mAh (CR2-03) and partly discharged to −580.55 mAh (CR2-06) SoC and the related line plots. The intensity increase, due to the lithium intercalation, during discharging is clearly visible. On the top, the electrode undergoes a very strong lithiation during the first period of discharging. Over the electrode length, a sinusoidal intensity profile with increasing period is observed, with maxima at the tab side. This structure is caused by a higher lithium content on that side.