fig2

Figure 2. (A) Chemical structures of PEO, poly(poly(ethylene glycol) methyl ether methacrylate) [P(PEGMA), a PEG-derived polyether] and P(DOL); (B) Key interfacial challenges of polyether electrolytes against Li metal anodes and corresponding modification strategies. PEO: Polyethylene oxide; P(PEGMA): poly[poly(ethylene glycol) methyl ether methacrylate]; PEG: polyethylene glycol; P(DOL): poly(1,3-dioxolane); SPE: solid polymer electrolyte; SEI: state electrolyte interphases; 3D: three-dimensional.