Patents by Inventor Margret Wohlfahrt-Mehrens
Margret Wohlfahrt-Mehrens has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11145910Abstract: Rechargeable, non-aqueous lithium batteries which contain, as active anode material, either lithium metal or a lithium alloy, an active cathode material with a redox potential in the range of between 1.5 and 3.4 V vs Li/Li+ and lithium rhodanide (LiSCN) as electrolyte component. One or more related methods for providing overcharge protection are also described herein.Type: GrantFiled: October 18, 2019Date of Patent: October 12, 2021Assignee: Albemarle Germany GmbHInventors: Ulrich Wietelmann, Ute Emmel, Irina Wolf, Margret Wohlfahrt-Mehrens, Serife Kaymaksiz Tost, Florian Wilhelm, Mario Wachtler
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Patent number: 10658664Abstract: The present invention relates to a method for producing lithium-nickel-manganese-based transition metal oxide particles, the transition metal oxide particles which are obtained with the method, and the use thereof as electrode material. The present invention particularly relates to lithium-nickel-manganese-based transition metal oxide particles in over-lithiated form with high tamped density, a method for production thereof and use thereof as cathode material in lithium secondary batteries.Type: GrantFiled: July 26, 2016Date of Patent: May 19, 2020Assignee: ZENTRUM FUR SONNENENERGIE UND WASSERSTOFF FORSCHUNG BADEN-WURTTEMBERG GEMEINNUTZIGE STIFTUNGInventors: Margret Wohlfahrt-Mehrens, Peter Axmann, Giulio Gabrielli, Marilena Mancini, Wolfgang Weirather
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Publication number: 20200052347Abstract: Rechargeable, non-aqueous lithium batteries which contain, as active anode material, either lithium metal or a lithium alloy, an active cathode material with a redox potential in the range of between 1.5 and 3.4 V vs Li/Li+ and lithium rhodanide (LiSCN) as electrolyte component. One or more related methods for providing overcharge protection are also described herein.Type: ApplicationFiled: October 18, 2019Publication date: February 13, 2020Inventors: Ulrich Wietelmann, Ute Emmel, Irina Wolf, Margret Wohlfahrt-Mehrens, Serife Kaymaksiz Tost, Florian Wilhelm, Mario Wachtler
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Patent number: 10483538Abstract: The present invention relates to a mixed oxide containing a) a mixed-substituted lithium manganese spinel in which some of the manganese lattice sites are occupied by lithium ions and b) a boron-oxygen compound. Furthermore, the present invention relates to a process for its preparation and the use of the mixed oxide as electrode material for lithium ion batteries.Type: GrantFiled: January 3, 2017Date of Patent: November 19, 2019Assignee: Johnson Matthey Public Limited CompanyInventors: Christian Vogler, Gerhard Nuspl, Margret Wohlfahrt-Mehrens, Peter Axmann, Gisela Arnold
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Publication number: 20180294481Abstract: The present invention relates to a method for producing lithium-nickel-manganese-based transition metal oxide particles, the transition metal oxide particles which are obtained with the method, and the use thereof as electrode material. The present invention particularly relates to lithium-nickel-manganese-based transition metal oxide particles in over-lithiated form with high tamped density, a method for production thereof and use thereof as cathode material in lithium secondary batteries.Type: ApplicationFiled: July 26, 2016Publication date: October 11, 2018Inventors: Margret WOHLFAHRT-MEHRENS, Peter AXMANN, Giulio GABRIELLI, Marilena MANCINI
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Publication number: 20170179485Abstract: The present invention relates to a mixed oxide containing a) a mixed-substituted lithium manganese spinel in which some of the manganese lattice sites are occupied by lithium ions and b) a boron-oxygen compound. Furthermore, the present invention relates to a process for its preparation and the use of the mixed oxide as electrode material for lithium ion batteries.Type: ApplicationFiled: January 3, 2017Publication date: June 22, 2017Applicant: Johnson Matthey PLCInventors: Christian VOGLER, Gerhard NUSPL, Margret WOHLFAHRT-MEHRENS, Peter AXMANN, Gisela ARNOLD
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Publication number: 20170149073Abstract: The invention relates to an arrangement and a method for the controlled discharge of an energy store using redox shuttle additives and to the use of redox shuttle additives for the controlled discharge of an energy store. The energy store arrangement comprises a storage container with a redox shuttle additive which is dispensed into the electrolytes of the energy store upon triggering a dispensing device such that the energy store is partly or completely discharged, wherein the redox shuttle additive is oxidized on the cathode and reduced on the anode. The redox shuttle additive has a redox potential which is less than or equal to the potential of the partially or completely discharged cathode and greater than or equal to the potential of the partially or completely discharged anode.Type: ApplicationFiled: June 19, 2015Publication date: May 25, 2017Inventors: Harry DOERING, Mario WACHTLER, Margret WOHLFAHRT-MEHRENS, Brita EMMERMACHER
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Patent number: 9562303Abstract: A mixed oxide containing a) a mixed-substituted lithium manganese spinel in which some of the manganese lattice sites are occupied by lithium ions and b) a boron-oxygen compound. Furthermore, a process for its preparation and the use of the mixed oxide as electrode material for lithium ion batteries.Type: GrantFiled: November 16, 2015Date of Patent: February 7, 2017Assignee: Johnson Matthey PLCInventors: Christian Vogler, Gerhard Nuspl, Margret Wohlfahrt-Mehrens, Peter Axmann, Gisela Arnold
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Publication number: 20160068991Abstract: A mixed oxide containing a) a mixed-substituted lithium manganese spinel in which some of the manganese lattice sites are occupied by lithium ions and b) a boron-oxygen compound. Furthermore, a process for its preparation and the use of the mixed oxide as electrode material for lithium ion batteries.Type: ApplicationFiled: November 16, 2015Publication date: March 10, 2016Applicant: Johnson Matthey PLCInventors: Christian VOGLER, Gerhard NUSPL, Margret WOHLFAHRT-MEHRENS, Peter AXMANN, Gisela ARNOLD
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Patent number: 9281522Abstract: A mixed oxide containing a) a mixed-substituted lithium manganese spinel in which some of the manganese lattice sites are occupied by lithium ions and b) a boron-oxygen compound. Furthermore, a process for its preparation and the use of the mixed oxide as electrode material for lithium ion batteries.Type: GrantFiled: June 23, 2009Date of Patent: March 8, 2016Assignee: Johnson Matthey PLCInventors: Christian Vogler, Gerhard Nuspl, Margret Wohlfahrt-Mehrens, Peter Axmann, Gisela Arnold
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Publication number: 20120183855Abstract: Positive active electrode material for lithium secondary batteries comprising a mixed oxide represented by the general formula LivNiwMnxCoyAlzO2 wherein 0.9?v?1.2, 0.34?w?0.49, 0.34?x?0.42, 0.08?y?0.20, 0.03?z?0.05, 0.8?w/x?1.8, ?0.08?w?x?0.22, 0.12?y+z?0.25 and w+x+y+z=1.Type: ApplicationFiled: September 27, 2010Publication date: July 19, 2012Applicant: SOLVAY SAInventors: Margret Wohlfahrt-Mehrens, Peter Axmann, Wolfgang Weirather, Karl Kohler
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Patent number: 8168150Abstract: The invention relates to binary, ternary and quaternary lithium phosphates of general formula Li(FexM1yM2z)PO4 wherein M1 represents at least one element of the group comprising Sc, Ti, V, Cr, Mn, Co, Ni, Cu, Zn, Be, Mg, Ca, Sr, Ba, Al, Zr, and La; M2 represents at least one element of the group comprising Sc, Ti, V, Cr, Mn, Co, Ni, Cu, Zn, Be, Mg, Ca, Sr, Ba, Al, Zr, and La; x=between 0.5 and 1, y=between 0 and 0.5, z=between 0 and 0.5, provided that x+y+z=1, or x=0, y=1 and z=0. The said lithium phosphates can be obtained according to a method whereby precursor compounds of elements Li, Fe, M1 and/or M2 are precipitated from aqueous solutions and the precipitation product is dried in an inert gas atmosphere or a reducing atmosphere at a temperature which is between room temperature and approximately 200° C. and tempered at a temperature of between 300° C. and 1000° C. The inventive lithium phosphates have a very high capacity when used as cathode material in lithium accumulators.Type: GrantFiled: April 10, 2002Date of Patent: May 1, 2012Assignee: Zentrum fur Sonnenenergie-und Wasserstoff-Forschung Baden-Wurttenberg, Gemeinnutzige StiftungInventors: Reinhard P. Hemmer, Giesela Arnold, Christian Vogler, Margret Wohlfahrt-Mehrens
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Publication number: 20110287319Abstract: A mixed oxide containing a) a mixed-substituted lithium manganese spinel in which some of the manganese lattice sites are occupied by lithium ions and b) a boron-oxygen compound. Furthermore, a process for its preparation and the use of the mixed oxide as electrode material for lithium ion batteries.Type: ApplicationFiled: June 23, 2009Publication date: November 24, 2011Applicant: Sud-Chemie AGInventors: Christian Vogler, Gerhard Nuspl, Margret Wohlfahrt-Mehrens, Peter Axmann, Gisela Arnold
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Publication number: 20090081454Abstract: The invention relates to carbon nanoparticles from fibers or tubes or combinations thereof, which have the morphology of macroscopic, spherical and/or spheroid secondary agglomerates, separated from each other. The invention also relates to a method for producing carbon nanoparticles by a CVD method using nanoporous catalyst particles having a spherical and/or spheroid secondary structure and comprising nanoparticulate metals and/or metal oxides or the precursors thereof as the catalytically active components. The inventive carbon nanoparticles are suitable for use in adsorbents, additives or active materials in energy accumulating systems, in supercapacitors, as filtering media, as catalysts or supports for catalysts, as sensors or as substrate for sensors, as additives for polymers, ceramics, metals and metal alloys, glasses, textiles and composite materials.Type: ApplicationFiled: July 7, 2006Publication date: March 26, 2009Applicant: ZENTRUM FUR SONNENENERGI-UND WASSERSTOFF- FORSCHUNG BADEN WURTTEMBERG GEMEINNUTZIGE SHIFTUNGInventors: Peter Axmann, Margret Wohlfahrt-Mehrens, Ulrich Storr
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Publication number: 20090035208Abstract: The invention relates to nanoporous catalyst particles having a spherical and/or spheroidal secondary structure, which contain, as catalytically active constituents, transition metals and/or oxides or precursors thereof. The invention also relates to a method for producing the nanoporous catalyst particles, during which, by means of a precipitation process, precursors with a spherical and/or spheroidal preliminary shape are produced from soluble compounds of the active constituents, and these morphologically pre-shaped precursors are, in a thermal activation step, transformed into nanoporous catalyst particles having a spherical and/or spheroidal secondary structure. The inventive catalyst particles can be used in the production of ceramic materials, as electrode materials in electrochemical cells or in fuel cells, as storage materials for chemical species and, in particular, in the production of carbon nanoparticles in the form of small tubes or fibers.Type: ApplicationFiled: July 7, 2006Publication date: February 5, 2009Inventors: Peter Axmann, Margret Wohlfahrt-Mehrens, Michael Kasper, Wolfgang Weirather
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Publication number: 20070275304Abstract: Among other things, a method for the production of a modified material, for example, a carbon material, is described, having the following steps: Generation of a high-frequency field in a chamber (2) of a plasmatron (1); introduction of a plasma gas into chamber (2); generation of a plasma with the plasma gas by the high-frequency field; and introduction of initial material into the plasma. In addition a plasmatron (1) is described for the production of a modified material (M), having: a chamber (2), at least one high-frequency inductor (3) disposed in at least one region of chamber (2), a gas supply line (10, 11) for introducing a plasma gas into the region of a high-frequency field generated by high-frequency inductor (3), and a material supply line (4) for blowing in initial material with a transport gas into the plasma generated by high-frequency inductor (3) with the plasma gas. Finally, it also describes a modified carbon material which is correspondingly produced.Type: ApplicationFiled: October 14, 2004Publication date: November 29, 2007Inventors: Joerg Friedrich, Gerhard Kuhn, Reinhard Mach, Heinz-Eberhard Maneck, Walter Schutz, Ludwig Jorissen, Ulrich Storr, Margret Wohlfahrt-Mehrens
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Patent number: 6849208Abstract: The invention relates to a nickel mixed hydroxide with Ni as the main element and with a layer structure, comprising at least one element Ma from the group comprising Fe, Cr, Co, Ti, Zr and Cu which is present in two different oxidation states which differ by one electron in terms of the number of outer electrons; at least one element Mb from the group comprising B, Al, Ga, In and RE (rare earth metals) present in the trivalent oxidation state; optionally at least one element Mc from the group comprising Mg, Ca, Sr, Ba and Zn present in the divalent oxidation state; apart from the hydroxide, at least one additional anion from the group comprising halides, carbonate, sulfate, oxalate, acetate, borate and phosphate in a quantity sufficient to preserve the electroneutrality of the mixed hydroxide; and water of hydration in a quantity which stabilizes the relevant structure of the mixed hydroxide.Type: GrantFiled: December 14, 1999Date of Patent: February 1, 2005Assignee: H. C. Starck GmbHInventors: Viktor Stoller, Armin Olbrich, Juliane Meese-Marktscheffel, Margret Wohlfahrt-Mehrens, Peter Axmann, Herbert Dittrich, Sandra Ströbele
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Publication number: 20040151649Abstract: The invention relates to binary, ternary and quaternary lithium phosphates of general formula Li(FexM1yM2z)PO4 wherein M1 represents at least one element of the group comprising Sc, Ti, V, Cr, Mn, Co, Ni, Cu, Zn, Be, Mg, Ca, Sr, Ba, Al, Zr, and La; M2 represents at least one element of the group comprising Sc, Ti, V, Cr, Mn, Co, Ni, Cu, Zn, Be, Mg, Ca, Sr, Ba, Al, Zr, and La; x=between 0.5 and 1, y=between 0 and 0.5, z=between 0 and 0.5, provided that x+y+z=1, or x=0, y =1 and z=0. The said lithium phosphates can be obtained according to a method whereby precursor compounds of elements Li, Fe, M1 and/or M2 are precipitated from aqueous solutions and the precipitation product is dried in an inert gas atmosphere or a reducing atmosphere at a temperature which is between room temperature and approximately 200° C. and tempered at a temperature of between 300° C. and 1000° C.Type: ApplicationFiled: April 7, 2004Publication date: August 5, 2004Inventors: Reinhard P. Hemmer, Giesela Arnold, Christian Vogler, Margret Wohlfahrt-Mehrens
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Patent number: 6511639Abstract: A process for recycling electrode materials from spent lithium batteries in which negative-electrode materials from the lithium/transition-metal mixed oxide class of compounds from discharged, spent lithium batteries can, after comminution of the electrode constituents, be re-synthesized into chemically identical products as employed for the production of the batteries comprising mechanical and extractive processing of these constituents with the aim of removing positive-electrode constituents and other secondary constituents, such as binders and other processing auxiliaries, followed by controlled high-temperature treatment without leaving thermal decomposition products behind.Type: GrantFiled: May 30, 2000Date of Patent: January 28, 2003Assignee: Merck Patent Gesellschaft mit beschrankter HaftungInventors: Michael Schmidt, Reinhard P. Hemmer, Margret Wohlfahrt-Mehrens, Giesela Arnold, Christian Vogler
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Patent number: 6080510Abstract: Ternary lithium mixed oxides having a spinel-type crystal structure and the general formula (I) Li.sub.y Me.sub.x Mn.sub.2-x O.sub.4 are disclosed. In this formula (I), Me represents a metal cation from groups IIa, IIIa, Iva, IIb, IIIb, IVb, IVb, VIIb, and VIII of the Periodic Table of Elements, x is in a range between 0 and 1, and y is in a range of greater than zero and not more than 1.2. The ternary mixed lithium oxide is obtainable by reacting reaction components in the form of hydroxides and/or water-soluble metal salts dissolved in a basic aqueous medium to form a homogenous suspension of the hydroxylic reaction products, removing water and optionally further solvents from the suspension, and subjecting the dried reaction products to heat treatment by heating them to temperatures between 500.degree. C. and 900.degree. C. at a heating speed of between 1 K/min and 20 K/min. The respective mixed oxides obtained are in a form which has no phase having a radiographic effect.Type: GrantFiled: June 30, 1997Date of Patent: June 27, 2000Assignee: Zentrum fur Sonnenenergie-und Wasserstoff Forshung Baden Wurttemberg Gemeinnultzige StiftungInventors: Reinhard P. Hemmer, Rudiger Oesten, Margret Wohlfahrt-Mehrens, Gisela Arnold