Preparation method of polyetheretherketone-based lithium battery separator

• Main Authors: SHE GUOHUA, HOU TIANWU, YAN HUA
• Format: Patent
• Language: Chinese; English
• Published: 06.07.2018
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention belongs to the field of a polyetheretherketone polymer material, and particularly discloses a preparation method of a polyetheretherketone-based lithium battery separator. The preparation method comprises the following steps of (1) chlorosulfonated fluorine monomer synthesis; (2) sulfonated polyetheretherketone synthesis; (3) solution mixing; (4) film formation and drying; and (5) hole formation and drying. The polyetheretherketone-based lithium battery separator prepared by the method has the following performance of electron insulativity, electrolyte corrosion resistance, enough chemical and electrochemical stability and relatively good dynamic property, and mechanical isolation of a positive electrode and a negative electrode is ensured. 本发明属于聚醚醚酮高分子材料领域，具体公开种聚醚醚酮基锂电池隔膜的制备方法，包括以下步骤：(1)氯磺化氟酮单体合成，(2)磺化聚醚醚酮合成，(3)溶液混合，(4)成膜、干燥，(5)成孔、干燥。通过本发明方法制备的聚醚醚酮基锂电池隔膜，有以下性能：具有电子绝缘性，保证正负极的机械隔离；耐电解液腐蚀，有足够的化学和电化学稳定性；具有较好的力学性能。