| Patent application number | Description | Published |
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| 20090208832 | Lamination Configurations for Battery Applications Using PVDF Highly Porous Film - A porous material manufactured Polyvinylidene Difluoride, or PVDF may be used in several configurations as a separator material for Lithium Ion and other types of batteries. The PVDF separator may be used with electrodes manufactured from a PVDF substrate for various lamination techniques in various configurations. The PVDF separator may be used in several configurations to enable more active material into a given battery construction, ensure better adhesion between layers, and overall increase the performance and capacity of a battery. | 08-20-2009 |
| 20100178567 | Mat Forming Spacers in Microporous Membrane Matrix - A microporous polymer used as a battery separator may be formed with hard, insoluble dielectric spacer materials in fibrous or particulate form. The spacer materials may form a barrier when the battery separator may melt or be crushed during an over-temperature event, possibly preventing a fire. The spacer materials may be located within the polymer matrix and may be added to a solution used to form the microporous polymer. | 07-15-2010 |
| 20100183907 | Hard Spacers in Microporous Membrane Matrix - A battery separator may be formed with hard spacers made from ceramic and other high temperature materials. The spacers may be incorporated into a microporous membrane so that the microporous matrix may capture and hold the spacers. The spacers may be solid or hollow glass beads that are in the range of 30% to 100% of the thickness of the separator, and may comprise less than 10 weight percent. The resulting membrane may be largely microporous, and the separators may help battery electrodes to remain physically separated, even after internal temperatures exceed the melt temperature of the separator. | 07-22-2010 |
| Patent application number | Description | Published |
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| 20100166961 | PRODUCTION OF HIGH POROSITY OPEN-CELL MEMBRANES - A method for forming an open celled membrane. A gelled polymer is formed of a polymer having a known polymer interfacial tension and a known polymer melting point. A first liquid into which the polymer is soluble, the first liquid being selected to have a first liquid interfacial tension to be 95% or less than the polymer interfacial tension is mixed with a second liquid that is miscible in the first liquid to form a mixture. The second liquid is selected to have a second liquid interfacial tension to be 105% or greater than the polymer interfacial tension. The polymer is dissolved into the mixture to form a saturated solution. The saturated solution reaches a solution forming temperature which is less than the polymer melting point. The saturated solution is spread on a substrate. The first liquid from the saturated solution to form the gelled polymer. | 07-01-2010 |
| 20100247894 | Reinforced Highly Microporous Polymers - The present invention provides microporous polymers and methods for producing and using the same. In particular, microporous polymers of the present invention are highly porous as indicated by a Gurley air permeability flow rate of about 4 seconds or less per mL of air flow per 25 micron of microporous polymer thickness per square inch. | 09-30-2010 |
| 20100248078 | Aqueous lithium ion cell possessing high specific energy and electrolyte with high, stable cell voltage - An electrochemical device is proposed that uses a novel electrolyte system technology, based on the use of conventional electrodes with high specific capacity selected to provide operating cell potentials within a range of approximately between 1.2 and 2.4 volts along with the use of an unconventional electrolyte solution. Specifically, his novel electrolyte system is based on the use of an aqueous electrolyte solution that has a window of voltage stability above the range of conventional aqueous electrolytes. Any of a variety of acid, neutral or basic aqueous solutions or gels with or without any of a variety of co-solvents, inorganic or organic salts or ionic liquids may be employed provided the conductivity and stability of the electrolytes are compatible with the selected electrochemical couples so as to provide high cell capacity, high rate capability and long term stability. | 09-30-2010 |
| 20100297489 | Treatment and Adhesive for Microporous Membranes - An electrochemical cell may have a PVDF microporous membrane that may be adhesively bonded to electrodes. The adhesive may be a mixture of a solvent and non-solvent that may cause the PVDF membrane to become tacky and adhere to an electrode without collapsing. An adhesively bonded cell may be constructed using multiple layers of adhesively bonded membranes and electrodes. In some embodiments, the adhesive solution may be used as a sizing to prepare electrodes for bonding. | 11-25-2010 |
| 20110146064 | Battery Manufacturing Using Laminated Assemblies - A microporous battery separator may be laminated to electrodes and manipulated through manufacturing on a continuous roll of material. Batteries may be constructed by layering the laminated electrodes and separator into various configurations, including flat and wound cell batteries. The separator may or may not contain a nonwoven or other reinforcement, and may be laminated to the electrodes using several different methods. | 06-23-2011 |
