Preparation method for crosslinked polyimide gel polymer electrolyte membrane

• Main Authors: ZHENG SHAOHUA, FENG RUNCAI
• Format: Patent
• Language: Chinese; English
• Published: 11.01.2017
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention discloses a preparation method for a crosslinked polyimide gel polymer electrolyte membrane. The method comprises the following steps of (1) performing a crosslinking reaction: dissolving soluble polyimide by an aprotic solvent, and performing the crosslinking reaction of the dissolved polyimide and a silane coupling agent with amino groups to obtain a coating A; (2) performing curing and film-forming: performing the curing process on the coating A, removing the solvent, and drying to obtain a membrane B; and (3) performing swelling: dipping the membrane B in a lithium ion battery electrolytic solution for swelling to obtain the crosslinked polyimide gel polymer electrolyte membrane. According to the method, the imide groups on the polyimide are mainly used to react with the amino groups on silane, and the imide groups and the amino groups are subjected to low-temperature crosslinking, so that the obtained crosslinked polyimide has more excellent heat stability; the crosslinked polyimide gel pol