Figure 3

7Li STRAFI profiles of a LiFePO4||Li half-cell battery after a charge (C, green) and discharge (D, red) cycle.
(i) LiFePO4 electrode, (ii) separator layer consisting of two Celgard 3501 membranes and (iii) Li foil. Dashed lines and battery assembly above the profile indicates the position of the Li metal foil, separator and LiFePO4 electrode as expected in the battery cell.