Patents Assigned to Evonik Litarion GmbH
  • Publication number: 20150287548
    Abstract: The invention relates to a method for producing an electrochemical cell, in particular a secondary battery or a double-layer capacitor, in which a cell vessel containing at least one porous cell component is filled with a flowable electrolyte. It is based on the object of providing a method involving simpler equipment that reacts to the fluctuating free volume with an adapted filling amount of electrolyte in the interests of optimum filling. This object is achieved by providing that, in a first filling step, an excess amount of electrolyte is introduced, in which the porous cell component is completely immersed, that the electrolyte introduced is subjected to a force that drives out of the cell vessel the part of the electrolyte that is not located in the pores of the porous component and that, in a second filling step, an added amount of electrolyte is introduced.
    Type: Application
    Filed: June 21, 2013
    Publication date: October 8, 2015
    Applicant: Evonik Litarion GmbH
    Inventor: Thomas Hecht
  • Publication number: 20150132682
    Abstract: The present invention relates to a method for producing an electrochemical cell, such as in particular a secondary battery, a double-layer capacitor, an electrolytic capacitor or a fuel cell, in which a cell vessel containing two electrodes of one-piece or multi-part design and at least one separator is filled with free-flowing electrolyte. The object of the invention is to match the quantity of electrolyte in an electrochemical cell as exactly as possible to the free volume actually present. The object is achieved in that, before the filling with the electrolyte, the quantity of electrolyte to be put in is determined at least while taking into account the actual thicknesses and the actual weights of the electrodes in the cell vessel and of the separator in the cell vessel.
    Type: Application
    Filed: April 29, 2013
    Publication date: May 14, 2015
    Applicant: Evonik Litarion GmbH
    Inventor: Thomas Hecht
  • Publication number: 20150037654
    Abstract: The invention relates to a perforated polymer film with porosity P from 30% to 50% and with an arrangement of perforations which is characterized by the perforation shape, the ratio of the semiaxes of the perforations, the orientation of the perforations, and the regular arrangement of the perforations, where the longitudinal tensile stress that the polymer film withstands without breaking is greater than that for identical porosity and any other arrangement of perforations which differs in at least one feature.
    Type: Application
    Filed: February 11, 2013
    Publication date: February 5, 2015
    Applicant: Evonik Litarion GmbH
    Inventors: Matthias Pascaly, Michael Kube, Ulrich Boes
  • Publication number: 20150017512
    Abstract: The invention relates to a process for producing a separator comprising the steps of: providing a sheetlike porous substrate, a solvent, ceramic particles and an adhesion promoter; preparing a slip by mixing the solvent, the adhesion promoter and the ceramic particles; coating the substrate with the slip and thermally drying the coated substrate to obtain the separator. The problem addressed is that of specifying a process useful for producing separators having a higher ceramic content. The problem is solved when the solvent used is a mixture of water and at least one organic component; the adhesion promoter used is a mixture of silanes and at least one thermally crosslinkable acrylic polymer; the slip is admixed with a carboxylic acid preparation and also with a defoamer component free from silicone oil.
    Type: Application
    Filed: January 29, 2013
    Publication date: January 15, 2015
    Applicant: Evonik Litarion GmbH
    Inventors: Rolf-Walter Terwonne, Witold Rex, Matthias Pascaly, Michael Kube, Christian Hying
  • Publication number: 20140127546
    Abstract: The invention relates to a separator which has a porous coating which is not electrically conductive and is composed of oxide particles which are adhesively bonded to one another and to the substrate by means of an inorganic adhesive and comprise at least one oxide selected from among Al2O3 and SiO2 on a substrate and in the interstices of the substrate which has fibres composed of a material which is not electrically conductive, characterized in that at least one sugar is present in the ceramic coating.
    Type: Application
    Filed: February 27, 2012
    Publication date: May 8, 2014
    Applicant: EVONIK LITARION GmbH
    Inventors: Matthias Pascaly, Rolf-Walter Terwonne, Christian Hying, Henrik Hahn
  • Publication number: 20130337334
    Abstract: The invention accordingly provides a silicon-carbon composite which has at least a proportion of hard carbon and a proportion of silicon powder and is obtained by, under a noble gas atmosphere, a) treating the hard carbon component at least once with high energy in a mechanofusion mixer and b) subsequently adding the silicon powder component thereto and mixing the components, or adding the silicon powder component during step a) and continuing the mechanofusion treatment, and is characterized in that the composite has an average particle size of less than or equal to 12 ?m, a proportion of hard carbon of from 5 to 50% by weight and a proportion of silicon powder of from 5 to 50% by weight.
    Type: Application
    Filed: January 27, 2012
    Publication date: December 19, 2013
    Applicant: Evonik Litarion GmbH
    Inventors: Chuanqi Tao, Martin Miessen, Peter Pilgram, Stefano Passerini, Martin Winter
  • Publication number: 20130327249
    Abstract: Cathode or anode, wherein the cathode binder or the anode binder comprises or consists of cellulose and/or cellulose derivatives which are soluble only in ionic liquids, a process for the production thereof and the use of cellulose and/or cellulose derivatives which are soluble only in ionic liquids as binder for producing cathodes and anodes, in particular battery electrodes.
    Type: Application
    Filed: December 20, 2011
    Publication date: December 12, 2013
    Applicants: ROCKWOOD LITHIUM GMBH, EVONIK LITARION GMBH, VOLKSWAGEN AKTIENGESELLSCHAFT
    Inventors: Martin Winter, Sangsik Jeong, Stefano Passerini
  • Publication number: 20130101878
    Abstract: The invention relates to a battery (0), comprising a plurality of self-contained, substantially cuboid cell housings (1), in each of which a side face is formed at least in some regions as a negative pole (?) and the opposite side face is designed at least in some regions as a positive pole (+), wherein the cell housings (1) bear against one another, with the pole (?) on the pole (+), and extend between a positive contact (14) and a negative contact (13), and wherein the cell housings (1) are each enclosed by an electrically non-conductive, mechanically supporting frame (2). The aim of the invention is to provide such a battery which has lower internal resistance and is therefore suitable for applications which require rapid charging or discharging (high-power applications).
    Type: Application
    Filed: July 18, 2011
    Publication date: April 25, 2013
    Applicant: Evonik Litarion GmbH
    Inventors: Peter Pilgram, Henrik Hahn, Ernst Robert Barenschee
  • Publication number: 20130034738
    Abstract: The invention relates to the use of N-ethyl pyrrolidone in the production of electrodes for double-layer capacitors.
    Type: Application
    Filed: November 16, 2010
    Publication date: February 7, 2013
    Applicant: Evonik Litarion GmbH
    Inventors: Peter Pilgram, Armin Modlinger
  • Publication number: 20120308871
    Abstract: 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.
    Type: Application
    Filed: June 14, 2012
    Publication date: December 6, 2012
    Applicant: Evonik Litarion GmbH
    Inventors: Matthias PASCALY, Christian Hying, Gerhard Hörpel, Volker Hennige