Invention Application
US20100028779A1 Porous Polyimide Membrane, Battery Separator, Battery, and Method
审中-公开
多孔聚酰亚胺膜，电池分离器，电池和方法
- Patent Title: Porous Polyimide Membrane, Battery Separator, Battery, and Method
- Patent Title (中): 多孔聚酰亚胺膜，电池分离器，电池和方法
-
Application No.: US12533664Application Date: 2009-07-31
-
Publication No.: US20100028779A1Publication Date: 2010-02-04
- Inventor: Qing GONG , Weiguo Yang , Lin Jiang , Jingyu Ren
- Applicant: Qing GONG , Weiguo Yang , Lin Jiang , Jingyu Ren
- Applicant Address: CN Shenzhen
- Assignee: BYD Co., Ltd.
- Current Assignee: BYD Co., Ltd.
- Current Assignee Address: CN Shenzhen
- Priority: CN20081014429.2 20080731; CN200810210165.6 20080829
- Main IPC: H01M4/58
- IPC: H01M4/58 ; C08J9/16 ; C08G73/10
Abstract:
A porous polyimide membrane is provided. The volume of pores with a diameter of between about 50 and about 300 nm is more than about 40%, preferably more than 75% of the total pore volume in the membrane. A method for preparing a porous polyimide membrane comprises: preparing a porous polyamide acid membrane; stretching the porous polyamide acid membrane to form a stretched membrane; and imidizing the stretched membrane to form a porous polyimide membrane. The volume of the pores with a diameter of about 50-300 nm is more than about 40%, preferably more than 75% of the total pore volume in the porous polyimide membrane.
Information query
