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 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 invention relates to separators for lithium batteries and to a process for producing them, and also to their use. The separators of the invention for lithium batteries, based on a sheetlike flexible substrate provided with a plurality of openings and having a porous inorganic electrically insulating coating on and in said substrate, said coating closing the openings in the substrate, the material of the substrate being selected from woven or non-woven electrically nonconductive polymeric fibers and the inorganic electrically conductive coating comprising metal oxide particles, are notable for the fact that the separators have lithium ion conducting properties without the presence of an electrolyte. After filling them with an additional lithium ion conducting electrolyte, the resulting ion conduction is much higher than in the case of conventional combinations of non-lithium ion conducting separators and electrolyte. The separators of the invention are especially suitable for use in high power lithium batteries.
摘要:
The present invention relates to electrical separators, especially for use in lithium high energy batteries, and to a process for making them. Separators for use in lithium high energy batteries have to have a very low weight and a very low thickness. It has been found that, surprisingly, such separators having a weight of less than 50 g/m2 and a thickness of less than 35 μm are preparable by applying a ceramic coating to a polymeric web less than 30 μm in thickness, these separators being very useful in lithium high energy batteries when pyrogenic oxides of the elements Al, Si and/or Zr are used as a particulate pore-forming component.
摘要翻译:本发明涉及特别用于锂高能电池的电隔离器及其制造方法。 用于锂高能电池的分离器必须具有非常低的重量和非常低的厚度。 已经发现,令人惊讶的是,通过将陶瓷涂层施加到小于30μm的聚合物网上,可以制备重量小于50g / m 2和厚度小于35μm的这种隔板 这些隔板在锂高能电池中非常有用,当元素Al,Si和/或Zr的热解氧化物用作颗粒成孔组分时。
摘要:
Separator for an electrochemical cell comprising a flexible perforate carrier having a ceramic coating on and in the carrier, the ceramic coating comprising from 75 to 99 parts by mass of oxidic particles selected from particles of ZrO2, SiO2 and Al2O3 and comprising from 1 to 25 parts by mass of zeolite particles. These separators exhibit distinctly improved ion conductivity after filling with an electrolyte and are useful as separators in lithium ion batteries in particular.
摘要翻译:用于电化学电池的分离器包括在载体上和载体上具有陶瓷涂层的柔性穿孔载体,所述陶瓷涂层包含75至99质量份的选自ZrO 2颗粒,SiO 2, 含有1〜25质量份的沸石颗粒的2'和2“O 3 O 3。 这些分离器在填充电解质后显示出明显改善的离子传导性,并且特别用作锂离子电池中的分离器。
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 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 insulating ceramic coating, said separator being characterized by a thickness of less than 80 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 relates to electrical separators for batteries, especially lithium batteries, having a shutdown mechanism and also a process for their production. An electrical separator is a separator which is used in batteries and other systems in which electrodes have to be separated from each other while maintaining ion conductivity for example. Safety is very important in lithium batteries, since in contrast to other types of battery (Pb, NiCd, NiMeH) the solvent for the electrolyte is not water but a combustible solvent, for example organic carbonates. This is why it is absolutely necessary for a separator for lithium cells to possess a suitable shutdown mechanism and at the same time for it not to be able to melt down. This object is achieved by an electrical separator according to the invention that comprises a shutdown layer which consists of particles which melt at a desired temperature, close the pores of the separator and so stop ion flow. Since the separator also comprises a porous inorganic (ceramic) layer on a carrier, the cells cannot melt down as a result of a completely melted separator.
摘要:
A description is given of a hybrid membrane which combines the advantages of the inorganic membranes, such as solvent resistance and stability, with the advantages of the organic membrane materials. The hybrid membrane described is composed of a ceramic support layer which is applied on a support comprising polymer fibers, and an organic, selective layer. The separating properties of the membranes can be tailored by varying the polymers and/or the way in which the polymer materials are treated and/or the conditions under which the polymeric selective separating layer is produced.