Patents by Inventor Palani Balaya

Palani Balaya 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).

  • Patent number: 10090516
    Abstract: The present disclosure provides a phosphate framework electrode material for sodium ion battery and a method for synthesizing such electrode material. A surfactant and precursors including a sodium precursor, a phosphate precursor, a transition metal precursor are dissolved in a solvent and stirred for sufficient mixing and reaction. The precursors are reacted to yield a precipitate of particles of NaxAbMy(PO4)zXn compound and with the surfactant attached to the particles. The solvent is then removed and the remaining precipitate is sintered to crystallize the particles. During sintering, the surfactant is decomposed to form a carbon network between the crystallized particles and the crystallized particles and the carbon matrix are integrated to form the electrode material.
    Type: Grant
    Filed: April 23, 2013
    Date of Patent: October 2, 2018
    Assignee: National University of Singapore
    Inventors: Palani Balaya, Saravanan Kuppan, Bing Liu, Chad William Mason
  • Patent number: 9527754
    Abstract: The present invention relates to the preparation of a mesoporous substantially pure anatase titanium oxide (meso-TiO2) and its use in electrochemical devices, in particular lithium-ion batteries.
    Type: Grant
    Filed: January 12, 2015
    Date of Patent: December 27, 2016
    Assignee: National University of Singapore
    Inventors: Palani Balaya, Ananthanarayanan Krishnamoorthy, Saravanan Kuppan
  • Publication number: 20160308212
    Abstract: A mesoporous nano-composite LiMn1-xFexPO4 (0?x?1) particle that has a uniform carbon coating on the surface of the particle. Also disclosed is a mesoporous nano-composite LiMn1-xFexPO4particle prepared by a process including steps: (i) providing a mixture of a soft-template compound, a lithium ion-containing compound, an iron ion-containing compound, a manganese ion-containing compound, and a phosphate ion-containing compound in a solvent; (2) removing the solvent to obtain a LiMn1-xFexPO4 precursor; and (3) calcining the precursor followed by milling and annealing to obtain the LiMn1-xFexPO4particle.
    Type: Application
    Filed: June 30, 2016
    Publication date: October 20, 2016
    Inventors: Palani Balaya, Vishwanathan Ramar
  • Patent number: 9385367
    Abstract: A process of preparing mesoporous nano-composite LiMn1-xFexPO4 (0?x?1, e.g., x=0, 0.2, 0.5 and 0.8) particles. The process contains the steps of providing a mixture of a soft-template compound, a lithium ion-containing compound, an iron ion-containing compound, a manganese ion-containing compound, and a phosphate ion-containing compound in a solvent, removing the solvent to obtain a LiMn1-xFexPO4 precursor, and calcining the precursor followed by milling and annealing. Also disclosed is a mesoporous nano-composite LiMn1-xFexPO4 particle prepared by this process.
    Type: Grant
    Filed: June 27, 2012
    Date of Patent: July 5, 2016
    Assignee: National University of Singapore
    Inventors: Palani Balaya, Vishwanathan Ramar
  • Patent number: 9327990
    Abstract: A process of preparing nanostructured lithium titanate particles. The process contains the steps of providing a solvent containing a soft-template compound, a lithium ion-containing compound, and a titanium ion-containing compound; removing the solvent to obtain a lithium titanate precursor; and calcining the precursor followed by milling and annealing. Also disclosed is a nanostructured lithium titanate particle prepared by this process.
    Type: Grant
    Filed: June 27, 2012
    Date of Patent: May 3, 2016
    Assignee: National University of Singapore
    Inventors: Palani Balaya, Srirama Hariharan
  • Publication number: 20150191364
    Abstract: The present invention relates to the preparation of a mesoporous substantially pure anatase titanium oxide (meso-TiO2) and its use in electrochemical devices, in particular lithium-ion batteries.
    Type: Application
    Filed: January 12, 2015
    Publication date: July 9, 2015
    Inventors: Palani Balaya, Ananthanarayanan KRISHNAMOORTHY, Saravanan KUPPAN
  • Publication number: 20150132640
    Abstract: The present disclosure provides a phosphate framework electrode material for sodium ion battery and a method for synthesizing such electrode material. A surfactant and precursors including a sodium precursor, a phosphate precursor, a transition metal precursor are dissolved in a solvent and stirred for sufficient mixing and reaction. The precursors are reacted to yield a precipitate of particles of NaxAbMy(PO4)zXn compound and with the surfactant attached to the particles. The solvent is then removed and the remaining precipitate is sintered to crystallize the particles. During sintering, the surfactant is decomposed to form a carbon network between the crystallized particles and the crystallized particles and the carbon matrix are integrated to form the electrode material.
    Type: Application
    Filed: April 23, 2013
    Publication date: May 14, 2015
    Inventors: Palani Balaya, Saravanan Kuppan, Bing Liu, Chad William Mason
  • Patent number: 8968931
    Abstract: The present invention relates to the preparation of a mesoporous substantially pure anatase titanium oxide (meso-TiO2) and its use in electrochemical devices, in particular lithium-ion batteries.
    Type: Grant
    Filed: November 8, 2010
    Date of Patent: March 3, 2015
    Assignee: National University of Singapore
    Inventors: Palani Balaya, Ananthanarayanan Krishnamoorthy, Saravanan Kuppan
  • Publication number: 20140220448
    Abstract: A process of preparing nanostructured lithium titanate particles. The process contains the steps of providing a solvent containing a soft-template compound, a lithium ion-containing compound, and a titanium ion-containing compound; removing the solvent to obtain a lithium titanate precursor; and calcining the precursor followed by milling and annealing. Also disclosed is a nanostructured lithium titanate particle prepared by this process.
    Type: Application
    Filed: June 27, 2012
    Publication date: August 7, 2014
    Applicant: National University of Singapore
    Inventors: Palani Balaya, Srirama Hariharan
  • Publication number: 20140134490
    Abstract: A process of preparing mesoporous nano-composite LiMn1-xFexPO4 (0?x?1, e.g., x=0, 0.2, 0.5 and 0.8) particles. The process contains the steps of providing a mixture of a soft-template compound, a lithium ion-containing compound, an iron ion-containing compound, a manganese ion-containing compound, and a phosphate ion-containing compound in a solvent, removing the solvent to obtain a LiMn1-xFexPO4 precursor, and calcining the precursor followed by milling and annealing. Also disclosed is a mesoporous nano-composite LiMn1-xFexPO4 particle prepared by this process.
    Type: Application
    Filed: June 27, 2012
    Publication date: May 15, 2014
    Applicant: National University of Singapore
    Inventors: Palani Balaya, Vishwanathan Ramar
  • Publication number: 20140113196
    Abstract: A method of preparing mesoporous nanostructured particles of a transition metal oxide. The method contains the steps of dissolving a soft-template compound in a solvent, dispersing a first or second row transition metal ion-containing compound, adjusting the pH value if necessary, and removing the solvent to obtain mesoporous nanostructured transition metal oxide powders, calcining the powders optionally to afford mesoporous nanostructured particles of the transition metal oxide. Also disclosed is particle prepared by the above-described method.
    Type: Application
    Filed: June 27, 2012
    Publication date: April 24, 2014
    Applicant: National University of Singapore
    Inventors: Palani Balaya, Srirama Hariharan
  • Publication number: 20130143123
    Abstract: Mesoporous particles each including LiFePO4 or Li3V2(PO4)3 crystallites and uniform coating of amorphous carbon on the surface of each of the crystallites. The crystallites have a size of 20-50 nm and the carbon coating has an average thickness of 2-7 nm. Also disclosed is a soft-template method of preparing the above-described mesoporous particles and the use of these mesoporous particles in lithium batteries.
    Type: Application
    Filed: August 19, 2011
    Publication date: June 6, 2013
    Applicant: National University of Singapore
    Inventors: Palani Balaya, Saravanan Kuppan, Hwang Sheng Lee, Ananthanarayanan Krishnamoorthy
  • Publication number: 20120225355
    Abstract: The present invention relates to the preparation of a mesoporous substantially pure anatase titanium oxide (meso-TiO2) and its use in electrochemical devices, in particular lithium-ion batteries.
    Type: Application
    Filed: November 8, 2010
    Publication date: September 6, 2012
    Inventors: Palani Balaya, Ananthanarayanan Krishnamoorthy, Saravanan Kuppan
  • Publication number: 20100210453
    Abstract: A method for the preparation of materials comprises the steps of: a) taking a first material comprising a compound of a first metal or of a first metal alloy, b) inserting said first material into an electrochemical cell as a first electrode, the electrochemical cell including a second electrode including a second metal different from a metal incorporated in the first material and an electrolyte adapted to transport the second metal to the first electrode and insert it into the first material by a current flowing in an external circuit resulting in the formation of a compound of the second metal in the first electrode material, the method being characterized by the step of treating the first electrode material after formation of the compound of the second metal to chemically remove at least some of the compound of the second metal to leave a material with a nanoporous structure.
    Type: Application
    Filed: March 29, 2007
    Publication date: August 19, 2010
    Applicant: Max-Planck-Gesellschaft zur Foerderung der Wissenschaften e.V.
    Inventors: Yong-Sheng Hu, Yu-Guo Guo, Palani Balaya, Joachim Maier, Sarmimala Hore
  • Publication number: 20060035148
    Abstract: The description relates to the use of at least one transition metal halide with a binder, e.g. at least one of PVDF, PTFE, PAN and ETDM and optionally with at least one conductive additive such as carbon black, graphite, metal powder and metal fibres as an electrode in an Li-based electrochemical energy storage device. Further electrode materials are also described based on ruthenium oxide, molybdenum oxide, a nano-composite composed of transition metal and lithium fluoride or lithium oxide clusters with a typical grain size of 1-10 mm.
    Type: Application
    Filed: September 11, 2003
    Publication date: February 16, 2006
    Inventors: Palani Balaya, Hong Li, Joachim Maier