改性碱性聚合物电解质薄膜及其制备方法

Electrolyte film of modified alkaline polymer and preparation method thereof

Abstract

本发明涉及一种改性碱性聚合物电解质薄膜及其制备方法;其特征在于由聚合物基体、碱性化合物、增塑剂和水组成,其中碱性化合物与聚合物基体的质量比为0.1~1.5∶1,增塑剂与聚合物基体的质量比为0.1~0.5∶1,水占改性碱性聚合物电解质薄膜质量的20%~50%。本发明采用溶液浇铸法,将增塑剂与聚合物基体共混,通过增塑改性来制备碱性复合聚合物电解质薄膜,所得复合体系在较宽温度范围内均具有较高离子电导率,良好的热稳定性和电化学稳定性,并具有电解质和隔膜的双重作用。
The invention relates to an electrolyte film of a modified alkaline polymer and a preparation method thereof. The electrolyte film of the modified alkaline polymer is characterized by being prepared from a polymer matrix, an alkali compound, a plasticizer and water, wherein the mass ratio of the alkali compound to the polymer matrix is 0.1-1.5 to 1, the mass ratio of the plasticizer to the polymer matrix is 0.1-0.5 to 1, and the water is 20-50 percent by weight of the electrolyte film of the modified alkaline polymer. The invention blends the plasticizer and the polymer matrix by adopting a solution casting method and prepares the electrolyte film of the alkali composite polymer by plasticization and modification, the obtained composite system has higher ionic electric conductivity in a wider temperature range, favorable thermal stability, electrochemical stability and dual roles as an electrolyte and a diaphragm.

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