Figure 3: Structure evolution of electrochemical sodiation.
From: A zero-strain layered metal oxide as the negative electrode for long-life sodium-ion batteries

In situ XRD patterns collected during the first discharge/charge of the Na/Na0.66[Li0.22Ti0.78]O2 cell under a current rate of C/7 at voltage range between 0.4 and 2.5 V.