In this work, 3D printable gel polymer electrolytes (GPEs) based on N,N‐dimethylacrylamide (DMAAm) and polyvinylidene fluoride (PVDF) in lithium chloride containing ethylene glycol solution are synthesized and their physicochemical properties are investigated. 3D printing is carried out with a customized stereolithography type 3D gel printer named “Soft and Wet Intelligent Matter‐Easy Realizer” and free forming GPE samples having variable shapes and sizes are obtained. Printed PVDF/PDMAAm‐based GPEs exhibit tunable mechanical properties and favorable thermal stability. Electrochemical proprieties of the printed GPEs are carried out via impedance spectroscopy in the temperature range of 25–90 °C by varying PVDF content. Ionic conductivity as high as 6.5 × 10⁻⁴ S cm⁻¹ is achieved at room temperature for GPE containing low PVDF content (5 wt%) and conductivity of the GPEs is increased as temperature rises.

中文翻译：

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柔性且导电的3D可打印聚偏二氟乙烯和聚N，N-二甲基丙烯酰胺基凝胶聚合物电解质

在这项工作中，合成了基于N，N-二甲基丙烯酰胺（DMAAm）和聚偏二氟乙烯（PVDF）的含乙二醇的氯化锂溶液的3D可印刷凝胶聚合物电解质（GPE），并研究了它们的理化性质。3D打印是使用定制的立体光刻3D凝胶打印机进行的，名为“软湿智能物易实现器”，并获得形状和大小可变的自由成型GPE样品。印刷的基于PVDF / PDMAAm的GPE表现出可调的机械性能和良好的热稳定性。印刷的GPE的电化学特性是通过在25-90°C的温度范围内通过改变PVDF含量的阻抗谱进行的。离子电导率高达6.5×10 ^-4对于含有低PVDF含量（5wt％）的GPE，在室温下达到S cm ^-1，并且随着温度升高，GPE的电导率增加。