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21. 发明授权

US10777800B2 Membranes, calendered microporous membranes, battery separators, and related methods 有权
公开(公告)号：US10777800B2
公开(公告)日：2020-09-15
申请号：US15267566
申请日：2016-09-16
申请人： Celgard, LLC
发明人： Kristoffer K. Stokes , William John Mason , Kang Karen Xiao , Xiaomin Zhang , Barry J. Summey , Robert Moran , Jeffrey Gordon Poley , Brian R. Stepp , Changqing Wang Adams , Daniel R. Alexander , Shante P. Williams , Andrew Edward Voss , Douglas George Robertson
IPC分类号： H01M2/14 , H01M2/16 , B32B27/32 , B32B27/08 , B32B37/14 , B32B38/00 , B32B37/00 , B29C48/08 , B29C48/21 , B29C48/00 , B29C55/00 , B29C55/02 , B29C55/14 , B29C65/02 , B29C65/00 , H01M2/18 , H01M10/42 , H01M10/052 , B32B37/16
摘要： Novel or improved microporous single or multilayer battery separator membranes, separators, batteries including such membranes or separators, methods of making such membranes, separators, and/or batteries, and/or methods of using such membranes, separators and/or batteries are provided. In accordance with at least certain embodiments, a multilayer dry process polyethylene/polypropylene/polyethylene microporous separator which is manufactured using the inventive process which includes machine direction stretching followed by transverse direction stretching and a subsequent calendering step as a means to reduce the thickness of the multilayer microporous membrane, to reduce the percent porosity of the multilayer microporous membrane in a controlled manner and/or to improve transverse direction tensile strength. In a very particular embodiment, the inventive process produces a thin multilayer microporous membrane that is easily coated with polymeric-ceramic coatings, has excellent mechanical strength properties due to its polypropylene layer or layers and a thermal shutdown function due to its polyethylene layer or layers. The ratio of the thickness of the polypropylene and polyethylene layers in the inventive multilayer microporous membrane can be tailored to balance mechanical strength and thermal shutdown properties.

22. 发明授权

US10741814B2 Microporous battery separators including polyolefin layer and non-woven layer with alkylbenzene sulfonic acid lithium salt surfactant, lithium batteries utilizing the same, and methods of manufacture of the same 有权
公开(公告)号：US10741814B2
公开(公告)日：2020-08-11
申请号：US15146936
申请日：2016-05-05
申请人： Celgard, LLC
发明人： Changqing Wang Adams , C. Glen Wensley , Stefan Reinartz
IPC分类号： H01M2/16 , H01M10/0525 , H01M4/58
摘要： In accordance with at least certain embodiments, the present invention is directed to novel, improved, coated, or treated separator membranes, separators or membrane based separators for lithium batteries. The membranes or separators may include non-woven layers, improved surfactant treatments, or combinations thereof. The separators or membranes are useful for solvent electrolyte lithium batteries, especially rechargeable lithium ion batteries, and provide improved performance, wettability, cycling ability, and/or recharging efficiency.

23. 发明申请

US20200161618A1 ADDITIVES FOR IMPROVED BATTERY PERFORMANCE, IMPROVED ADDITIVE-CONTAINING MEMBRANES, IMPROVED BATTERY SEPARATORS, IMPROVED BATTERIES, AND RELATED METHODS 审中-公开
公开(公告)号：US20200161618A1
公开(公告)日：2020-05-21
申请号：US16347664
申请日：2017-11-07
申请人： Celgard, LLC
发明人： Changqing Wang Adams , Kang Karen Xiao , Stefan Reinartz , Masaaki Okada , Brian R. Stepp , Yao Lu , Eric Robert White , Katharine Chemelewski
IPC分类号： H01M2/16 , H01M10/052
摘要： Described herein, are battery separators, comprising the following: a microporous polymeric film; and an optional coating layer on at least one side of the microporous polymeric film, wherein at least one of the microporous polymeric film and the optional coating comprises an additive. The additive is selected from the group consisting of a lubricating agent, a plasticizing agent, a nucleating agent, a shrinkage reducing agent, a surfactant, an SEI improving agent, a cathode protection agent, a flame retardant additive, LiPF6 salt stabilizer, an overcharge protector, an aluminum corrosion inhibitor, a lithium deposition agent or improver, or a solvation enhancer, an aluminum corrosion inhibitor, a wetting agent, and a viscosity improver. Also, described herein are batteries, including lithium-ion batteries, comprising one or more of the described separators. Methods for making the battery separators are also described.

24. 发明授权

US10461293B2 Microporous membranes, separators, lithium batteries, and related methods 有权
公开(公告)号：US10461293B2
公开(公告)日：2019-10-29
申请号：US15093899
申请日：2016-04-08
申请人： Celgard, LLC
发明人： Changqing Wang Adams , Michael Bielmann , Zhengming Zhang
IPC分类号： H01M2/14 , H01M2/16 , H01M10/0525
摘要： In accordance with at least selected embodiments, novel or improved separator membranes, separators, batteries including such separators, methods of making such membranes and/or separators, and/or methods of using such membranes and/or separators are disclosed or provided. In accordance with at least certain embodiments, an ionized radiation treated microporous polyolefin, polyethylene (PE), copolymer, and/or polymer blend (e.g., a copolymer or blend comprising PE and another polymer, such as polypropylene (PP)) battery separator for a secondary or rechargeable lithium battery and/or a method of making an ionized radiation treated microporous battery separator is disclosed. The ionized radiation treatment may provide a microporous membrane or battery separator having a lower onset temperature of thermal shutdown, an extended thermal shutdown window, physical, dimensional, and/or mechanical integrity maintained at higher temperatures, improved battery safety performance in a rechargeable lithium battery, a treated polyethylene separator membrane with the high temperature performance of a polypropylene membrane or separator membrane, or polypropylene-based trilayer product (by way of example only, a trilayer membrane made of two polypropylene layers with a polyethylene layer in between), reduced thermal shrinkage resulting in both improved thermal stability and high temperature physical integrity, which maintains the separation of cathode and anode in a battery system and avoids thermal runaway in a rechargeable or secondary lithium battery, and/or combinations thereof.

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