fig2
![Recent progress of multilayer polymer electrolytes for lithium batteries](https://image.oaes.cc/3d935bff-486e-4a99-acb1-20f76948b38c/5376.fig.2.jpg)
Figure 2. Methods to improve ionic conductivity of SPEs. (A) Relationship between content of different lithium salts and Li-ion conductivity. Reproduced with permission[49]. Copyright, Elsevier 2003. (B) Influence of SN plasticizer content on ionic conductivity. Reproduced with permission[50]. Copyright, Springer Nature 2022. (C) Schematic images of transfer process of composite electrolytes with different contents of ceramic fillers. (D) Arrhenius plots of (1-x) wt.%[PEO8-LiTFSI]-x wt.% LLZTO composite electrolyte. Reproduced with permission[52]. Copyright, Elsevier 2018.