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Figure 9. 2D materials as solid electrolyte additive. (A) Illustration of Li+ intercalation, bulk MPS exfoliation, and the fabrication process of PEO-LiMPS electrolytes. Reproduced with permission[172]. Copyright 2023, Elsevier. (B) Schematic diagrams for the fabrication of TiO2 nanosheets through in situ HF etching, hydrothermal oxidation, and incorporation with PVA–Zn(CF3SO3)2 gel electrolytes. Reproduced with permission[174]. Copyright 2022, Elsevier.