fig3

Figure 3. (A) Ex situ GPE vs. in situ GPE, with in situ GPE having higher ionic conductivity^[44]. Reproduced from Ref.^[44] with permission from John Wiley and Sons. (B) Schematic diagram of bottom-up infilling method^[45]. Reproduced from Ref.^[45] with permission from Springer Nature. GPE: Gel polymer electrolyte.