Patents by Inventor Pierre Gibot
Pierre Gibot 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: 9051184Abstract: The invention relates to crystalline nanometric olivine-type LiFe1-xMxPO4 powder with M being Co and/or Mn, and 0?x?1, with small particle size and narrow particle size distribution. A direct precipitation process is described, comprising the steps of: providing a water-based mixture having at a pH between 6 and 10, containing a dipolar aprotic additive, and Li(I), Fe(II), P(V), and Co(II) and/or Mn(II) as precursor components; heating said water-based mixture to a temperature less than or equal to its boiling point at atmospheric pressure, thereby precipitating crystalline LiFe1-xMxPO4 powder. An extremely fine particle size is obtained of about 80 nm for Mn and 275 nm for Co, both with a narrow distribution.Type: GrantFiled: October 6, 2011Date of Patent: June 9, 2015Assignees: Umicore, Centre National de la Recherche ScientifiqueInventors: Stéphane Levasseur, Michèle Van Thournout, Pierre Gibot, Christian Masquelier
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Publication number: 20140113188Abstract: The invention relates to active materials for the manufacture of Li-based batteries. A crystalline nanometric powdered material with formula Lix(M, M?)PO4, in particular LixFePO4 (0?x?1), is disclosed, exhibiting single phase Li insertion/extraction mechanism at room temperature when used as positive electrode material in Li-based batteries. Compared to current LiFePO4, the novel material results in smooth, sloping charge/discharge voltage curves, greatly simplifying the monitoring of the state of charge of the batteries. The coexistence of mixed valence states for Fe (i.e. FeIIIVFeII) is believed to increase the electronic conductivity in the room temperature single phase LixFePO4 material, compared to state of the art two-phase materials. This, together with the nanometric size of the particles and their sharp monomodal size distribution, contributes to the exceptional high-rate capability demonstrated in batteries.Type: ApplicationFiled: December 23, 2013Publication date: April 24, 2014Inventors: Pierre GIBOT, Christian MASQUELIER, Jean-Marie TARASCON, Stephane LEVASSEUR, Philippe CARLACH
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Patent number: 8641921Abstract: The invention relates to active materials for the manufacture of Li-based batteries. A crystalline nanometric powdered material with formula Lix(M, M?)PO4, in particular LixFePO4 (O?x?1), is disclosed, exhibiting single phase Li insertion/extraction mechanism at room temperature when used as positive electrode material in Li-based batteries. Compared to current LiFePO4, the novel material results in smooth, sloping charge/discharge voltage curve greatly simplifying the monitoring of the state of charge of the batteries. The coexistence of mixed valence states for Fe (i.e. FeIIIVFeII) is believed to increase the electronic conductivity in the room temperature single phase LixFePO4 material, compared to state of the art two-phase materials. This, together with the nanometric size of the particles and their sharp monomodal size distribution, contributes to the exceptional high-rate capability demonstrated in batteries.Type: GrantFiled: March 19, 2008Date of Patent: February 4, 2014Assignees: Umicore, Centre National de la Recherche ScientifiqueInventors: Pierre Gibot, Christian Masquelier, Jean-Marie Tarascon, Stephane Levasseur, Philippe Carlach
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Publication number: 20120085975Abstract: The invention relates to crystalline nanometric olivine-type LiFe1-xMxPO4 powder with M being Co and/or Mn, and 0?x?1, with small particle size and narrow particle size distribution. A direct precipitation process is described, comprising the steps of: providing a water-based mixture having at a pH between 6 and 10, containing a dipolar aprotic additive, and Li(I), Fe(II), P(V), and Co(II) and/or Mn(II) as precursor components; heating said water-based mixture to a temperature less than or equal to its boiling point at atmospheric pressure, thereby precipitating crystalline LiFe1-xMxPO4 powder. An extremely fine particle size is obtained of about 80 nm for Mn and 275 nm for Co, both with a narrow distribution.Type: ApplicationFiled: October 6, 2011Publication date: April 12, 2012Applicants: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, UMICOREInventors: Stephane LEVASSEUR, Michèle VAN THOURNOUT, Pierre GIBOT, Christian MASQUELIER
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Patent number: 8105508Abstract: The present invention relates to crystalline nanometric olivine-type LiFe1-xMnxPO4 powder with 0<x<1, with small particle size and narrow particle size distribution. The fine particle size is believed to account for excellent high-drain properties, while minimizing the need for conductive additives. The narrow distribution facilitates the electrode manufacturing process and ensures a homogeneous current distribution within the battery.Type: GrantFiled: June 29, 2010Date of Patent: January 31, 2012Assignees: Umicore, Centre National de la Recherche ScientifiqueInventors: Stéphane Levasseur, Michèle Van Thournout, Pierre Gibot, Christian Masquelier
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Patent number: 8066916Abstract: The present invention relates to lithium secondary batteries and more specifically to positive electrode materials operating at potentials greater than 2.8 V vs. Li+/Li in non-aqueous electrochemical cells. In particular, the invention relates to crystalline nanometric olivine-type LiFe1-xMxPO4 powder with M is Co and/or Mn, and 0<x<1, with small particle size and narrow particle size distribution. A direct precipitation process is described, comprising the steps of:—providing a water-based mixture having at a pH between 6 and 10, containing a dipolar aprotic additive, and Li(I), Fe(II), P(V), and Co(II) and/or Mn(II) as precursor components;—heating said water-based mixture to a temperature less than or equal to its boiling point at atmospheric pressure, thereby precipitating crystalline LiFe1-xMxPO4 powder. An extremely fine particle size is obtained of about 80 nm for Mn and 275 nm for Co, both with a narrow distribution.Type: GrantFiled: November 19, 2007Date of Patent: November 29, 2011Assignees: Umicore, Centre National de la Recherche ScientifiqueInventors: Stephane Levasseur, Michèle Van Thournout, Pierre Gibot, Christian Masquelier
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Publication number: 20100327222Abstract: The present invention relates to lithium secondary batteries and more specifically to positive electrode materials operating at potentials greater than 2.8 V vs. Li+/Li in non-aqueous electrochemical cells. In particular, the invention relates to crystalline nanometric olivine-type LiFe1-xMxPO4 powder with M is Co and/or Mn, and 0<x<1, with small particle size and narrow particle size distribution. A direct precipitation process is described, comprising the steps of: providing a water-based mixture having at a pH between 6 and 10, containing a dipolar) aprotic additive, and Li(I), Fe(II), P(V), and Co(II) and/or Mn(II) as precursor components; heating said water-based mixture to a temperature less than or equal to its boiling point at atmospheric pressure, thereby precipitating crystalline LiFe1-xMxPO4 powder. An extremely fine particle size is obtained of about 80 nm for Mn and 275 nm for Co, both with a narrow distribution.Type: ApplicationFiled: June 29, 2010Publication date: December 30, 2010Applicants: UMICORE, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUEInventors: Stephane LEVASSEUR, Michèle VAN THOURNOUT, Pierre GIBOT, Christian MASQUELIER
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Publication number: 20100086852Abstract: The invention relates to active materials for the manufacture of Li-based batteries. A crystalline nanometric powdered material with formula Lix(M, M?)PO4, in particular LixFePO4 (O?x?1), is disclosed, exhibiting single phase Li insertion/extraction mechanism at room temperature when used as positive electrode material in Li-based batteries. Compared to current LiFePO4, the novel material results in smooth, sloping charge/discharge voltage curve greatly simplifying the monitoring of the state of charge of the batteries. The coexistence of mixed valence states for Fe (i.e. FeIIIVFeII) is believed to increase the electronic conductivity in the room temperature single phase LixFePO4 material, compared to state of the art two-phase materials. This, together with the nanometric size of the particles and their sharp monomodal size distribution, contributes to the exceptional high-rate capability demonstrated in batteries.Type: ApplicationFiled: March 19, 2008Publication date: April 8, 2010Inventors: Pierre Gibot, Christian Masquelier, Jean-Marie Tarascon, Stephane Levasseur, Philippe Carlach
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Publication number: 20100084615Abstract: The present invention relates to lithium secondary batteries and more specifically to positive electrode materials operating at potentials greater than 2.8 V vs. Li+/Li in non-aqueous electrochemical cells. In particular, the invention relates to crystalline nanometric olivine-type LiFe1-xMxPO4 powder with M is Co and/or Mn, and 0<x<1, with small particle size and narrow particle size distribution. A direct precipitation process is described, comprising the steps of:—providing a water-based mixture having at a pH between 6 and 10, containing a dipolar aprotic additive, and Li(I), Fe(II), PV, and Co(II) and/or Mn(II) as precursor components;—heating said water-based mixture to a temperature less than or equal to its boiling point at atmospheric pressure, thereby precipitating crystalline LiFe1-xMxPO4 powder. An extremely fine particle size is obtained of about 80 nm for Mn and 275 nm for Co, both with a narrow distribution.Type: ApplicationFiled: November 19, 2007Publication date: April 8, 2010Inventors: Stephane Levasseur, Michèle Van Thournout, Pierre Gibot, Christian Masquelier