Figure 5.

(a) Charge and discharge profile of the SnO₂ NPs under electrochemical lithiation and (b) comparison of in situ and ex situ TEM images of SnO₂ NPs before lithiation (blue box) and after the conversion reaction (red box). (c) Comparison of SAED patterns of SnO₂ NPs under GLC and the electrochemical system before lithiation (blue) and after the conversion reaction (red box). Both in situ and ex situ TEM images are in good agreement, which suggests that in situ TEM observation using GLC is a reliable way to observe phase transition.