| 摘要 |
Novel or improved microporous battery separator membranes, separators, cells, batteries including such membranes, separators, or cells, and/or methods of making such membranes and/or separators, and/or methods of using such membranes and/or separators. In accordance with at least certain embodiments, an improved or novel battery separator for a secondary or rechargeable lithium battery may have low Electrical resistance of less than 0.95 ohm-cm2, or in some cases, less than 0.8 ohm-cm2. Furthermore, the inventive battery separator membrane may provide a means to achieve an improved level of battery performance in a rechargeable or secondary lithium battery based on a possibly synergistic combination of low Electrical resistance, low Gurley, low tortuosity, and/or a unique trapezoid shaped pore. In accordance with at least certain multilayer embodiments (by way of example only, a trilayer membrane made of two polypropylene layers with a polyethylene layer in between), the inventive microporous membrane or battery separator may have excellent onset and rate of thermal shutdown performance. |
| 主权项 |
1. A novel, improved or modified polyolefin battery separator membrane, comprising:
a microporous separator membrane having an electrical resistance less than 0.95 ohm-cm2, having a Gurley less than 500 sec/100 cc, having a tortuosity less than 1.5, and wherein said microporous polyolefin separator membrane has a non-round, trapezoid shape pore. |
