Solid‐state electrolytes can alleviate the safety issues of electrochemical energy systems related to chemical and thermal instabilities of liquid electrolytes. While a liquid provides seamless ionic transport with almost perfect wettability between electrodes, a solid‐state electrolyte needs to demonstrate at least comparable electrochemical performance to liquid electrolytes as well as mechanical robustness and flexibility. Here, the facile preparation of montmorillonite (MMT)/dimethyl sulfoxide (DMSO) nanocomposites is reported, which show high ionic conductivities, mechanical strengths, and thermal stabilities by forming nacre‐mimetic “brick‐and‐mortar” structures. The molecularly confined structures of DMSO are confirmed by X‐ray diffraction peaks with d‐spacings of interplanar spacing that are slightly larger than MMTs. The MMT/DMSO composites have mechanical strengths and toughnesses of 55.3 ± 4.8 MPa and 210.2 ± 32.6 kJ m⁻², respectively. The ionic conductivity is ≈2 × 10⁻⁴ S cm⁻¹ at room temperature, and their thermal stability is in the range of −100 to 120 °C. The optical translucency, on‐demand eco‐degradability, and solution processability together make the MMT/DMSO composites unique materials with a wide range of solid‐state electrochemical applications including batteries.

中文翻译：

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粘土纳米约束的DMSO复合材料可生态降解的柔性固态离子导体

固态电解质可以缓解与液体电解质的化学和热不稳定性有关的电化学能量系统的安全问题。尽管液体提供了无缝的离子传输，并且在电极之间具有几乎完美的润湿性，但固态电解质需要证明至少具有与液体电解质相当的电化学性能以及机械强度和柔韧性。在此，据报道，蒙脱土（MMT）/二甲基亚砜（DMSO）纳米复合材料的制备简便，通过形成类似珍珠质的“砖和砂浆”结构，其具有高离子电导率，机械强度和热稳定性。DMSO的分子结构限制通过用X射线衍射峰证实d平面间距比MMT稍大。MMT / DMSO复合材料的机械强度和韧性分别为55.3±4.8 MPa和210.2±32.6 kJ m ^-2。离子电导率在室温下约为≈2×10 ^-4 S cm ^-1，其热稳定性在-100至120°C的范围内。光学半透明性，按需生态降解性和溶液可加工性共同使MMT / DMSO复合材料成为具有广泛固态电化学应用（包括电池）的独特材料。