摘要:
The present invention relates to a vapor-pervious water-impervious substrate, preferably a fibrous nonwoven web, which can be used in particular as a textile continuous sheet material, for example as an awning or as an inlet in apparel. The substrate according to the present invention may have self-cleaning properties. The substrate according to the present invention is simple to produce in an at least two-step process wherein a coating on the fibers of the substrate is produced in the first step and then hydrophobic particles are applied to the coated fibers by means of an adhesion promoter.
摘要:
The present invention relates to electrical separators and to a process for producing them.An electrical separator is a separator used in batteries and other arrangements in which electrodes have to be separated from each other while maintaining ion conductivity for example. The separator is preferably a thin porous insulating material processing high ion perviousness, good mechanical strength and long-term stability to the chemicals and solvents used in the system, for example in the electrolyte of the battery. In batteries, the separator shall fully electrically insulate the cathode from the anode. Moveover, the separator shall be permanently elastic and follow movements in the system, for example in the electrode pack in the course of charging and discharging.This object is achieved by an electrical separator according to the invention, comprising a sheetlike flexible substrate having a multiplicity of openings and having a coating on and in said substrate, said substrate being a polymeric nonwoven and said coating being a porous electrically insulating ceramic coating, said separator being characterized by said nonwoven having a thickness of less than 30 μm, a porosity of more than 50% and a pore radius distribution in which at least 50% of the pores have a pore radius from 75 to 150 μm.
摘要:
A pyrogenic oxidic powder composed of particles, comprising (i) atoms of an element of groups 3A, 4A, 3B or 4B of the periodic table of the elements, and (ii) oxygen atoms, said particles being characterized by lithium atoms attached to said atoms via an oxygen bridge.
摘要:
The present invention concerns separator-electrode assemblies for lithium batteries and also a process for their production.The separator-electrode assemblies (SEAs) comprise a porous electrode useful as an electrode, ie. Positive (cathode) or negative (anode) electrode, in a lithium battery and a separator layer applied to this electrode. The separator electrode assembly (SEA) is characterized in that it has an inorganic separator layer comprising at least two fractions of metal oxide particles different from each other in their average particle size and/or in the metal, and an electrode whose active mass particles are bonded together and to the current collector by inorganic adhesive.The separator-electrode assembly of the invention has the advantage that it is simple to manufacture as one component and that distinctly higher temperatures can be employed in production than in the production of conventional separator-electrode assemblies, since the electrode does not contain heat-sensitive organic materials.
摘要:
The present invention concerns separator-electrode assemblies for lithium batteries and also a process for their production.The separator-electrode assemblies (SEAS) comprise a porous electrode useful as an electrode, ie. Positive (cathode) or negative (anode) electrode, in a lithium battery and a separator layer applied to this electrode. The separator electrode assembly (SEA) is characterized in that it has an inorganic separator layer comprising at least two fractions of metal oxide particles different from each other in their average particle size and/or in the metal, and an electrode whose active mass particles are bonded together and to the current collector by inorganic adhesive.The separator-electrode assembly of the invention has the advantage that it is simple to manufacture as one component and that distinctly higher temperatures can be employed in production than in the production of conventional separator-electrode assemblies, since the electrode does not contain heat-sensitive organic materials.
摘要:
The invention relates to a separator filled with an electrolyte composition. The separator has a ceramic surface and the electrolyte composition comprises an ionic fluid. Filling with the electrolyte composition can take place, for example, by inserting the separator into a battery, e.g. into a lithium ion battery, which is filled with a corresponding electrolyte composition.
摘要:
The present invention relates to electrical separators and to a process for making them. An electrical separator is a separator used in batteries and other arrangements in which electrodes have to be separated from each other while maintaining ion conductivity for example. The separator is preferably a thin porous insulating material possessing high ion permeability, good mechanical strength and long-term stability to the chemicals and solvents used in the system, for example in the electrolyte of the battery. In batteries, the separator should fully electrically insulate the cathode from the anode. Moreover, the separator has to be permanently elastic and to follow movements in the system, for example in the electrode pack in the course of charging and discharging. This object is achieved by an electrical separator according to the invention, comprising a sheetlike flexible substrate having a multiplicity of openings and having a coating on and in said substrate, said substrate being a polymeric nonwoven and said coating being a porous electrically insulting ceramic coating, said separator being characterized by a thickness of less than 80 μm.
摘要:
Separator-electrode assemblies (SEAs) comprising a porous electrode useful as a positive or negative electrode in a lithium battery and a separator layer applied to this electrode, the separator layer being an inorganic separator layer comprising at least two fractions of metal oxide particles different from each other in their average particle size and/or in the metal, and the electrode having active mass particles that are bonded together and to a current collector by an inorganic adhesive; and a process for their production.
摘要:
The invention relates to a ceramic composite material (1), comprising a planar carrier substrate (2) and a porous coating (4) that is applied onto the carrier substrate (2) and contains ceramic particles (3). The problem underlying the invention is that of further developing a ceramic composite material of type such that lower thicknesses can be achieved while maintaining the high thermal and mechanical stability. Said problem is solved by a ceramic composite material having a polymeric film (2) as the carrier substrate (2), wherein the carrier substrate (2) is provided with a perforation that consists of a plurality of holes (6) arranged at regular intervals, and wherein the perforation is covered by the porous coating (4) at least on one side of the carrier substrate (2). A cross-section of the ceramic composite material according to the invention is shown in FIG. 1.
摘要:
The present invention relates to separator-electrode units for lithium batteries and also to a process for their production.The separator-electrode units comprise a porous electrode which is useful as a positive electrode (cathode) or negative electrode (anode) in a lithium battery and a separator layer applied to this electrode and are characterized in that the separator-electrode units comprise a purely inorganic separator layer which comprises at least two fractions of metal oxide particles which differ from each other in their average particle size and/or in the metal. More particularly, the separator layer comprises metal oxide particles having an average particle size (Dg) which is greater than the average pore size (d) of the pores of the porous positive electrode that are bonded together by metal oxide particles having a particle size (DO which is smaller than the pores of the porous electrode.The separator-electrode unit of the invention has the advantage that it is simple to manufacture as one component and, since the step of laminating the separator onto the electrode can be omitted, that it can comprise a large variation of materials. In addition, a separator-electrode unit according to the invention possesses excellent mechanical stability and a very low separator thickness, which is why it can even be used in lithium high energy batteries.