The most daunting challenge of solid polymer electrolytes (SPEs) is the development of materials with simultaneously high ionic conductivity and mechanical strength. Herein, SPEs of lithium bis-(trifluoromethanesulfonyl)imide (LiTFSI)-doped poly(propylene monothiocarbonate)-b-poly(ethylene oxide) (PPMTC-b-PEO) block copolymers (BCPs) with both blocks associating with Li+ ions are prepared. It is found that the PPMTC-b-PEO/LiTFSI electrolytes with double conductive phases exhibit much higher ionic conductivity (2 × 10-4 S cm-1 at r.t.) than the BCP electrolytes with a single conductive phase. Concurrently, the storage moduli of PPMTCn -b-PEO44 /LiTFSI electrolytes are ≈1-4 orders of magnitude higher than that of the neat PEO/LiTFSI electrolytes. Therefore, simultaneous improvement of ionic conductivity and mechanical properties is achieved by construction of a microphase-separated and disordered structure with double conductive phases.

中文翻译：

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同时提高具有双导电纳米相的嵌段共聚物电解质的离子电导率和机械强度。

固体聚合物电解质（SPE）的最艰巨挑战是开发同时具有高离子电导率和机械强度的材料。在此，制备了双（三氟甲磺酰基）酰亚胺锂（LiTFSI）掺杂的聚单硫代碳酸亚丙酯-b-聚环氧乙烷（PPMTC-b-PEO）嵌段共聚物（BCP）的SPE，其中两个嵌段均与Li +离子缔合。 。已发现，具有双导电相的PPMTC-b-PEO / LiTFSI电解质比具有单导电相的BCP电解质具有更高的离子电导率（室温下为2×10-4 S cm-1）。同时，PPMTCn -b-PEO44 / LiTFSI电解质的储能模量比纯PEO / LiTFSI电解质的储能模量高约1-4个数量级。因此，