Organic Solute Component In Aqueous Electrolyte Patents (Class 429/347)
  • Patent number: 6413679
    Abstract: Disclosed is a battery which has means which, upon the occurrence of an abnormal phenomenon, such as an overcharge or an external short circuit, rapidly operates a safety mechanism, such as a current breaking valve, to ensure the safety of the battery and which, particularly upon the occurrence of an abnormal phenomenon, can surely and stably increase the pressure within the battery. The battery comprises a positive electrode, a negative electrode, a separator, an electrolysis solution, and a hermetically sealed container, the hermetically sealed container containing in its interior a compound represented by formula (1): X—O—CO—R  (1) wherein X represents a group which, upon decomposition of the compound caused by a rise in temperature, is eliminated to evolve a gas insoluble or slightly soluble in the electrolysis solution; and R represents a group which controls the decomposition temperature of the compound.
    Type: Grant
    Filed: March 14, 2000
    Date of Patent: July 2, 2002
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takashi Kuboki, Takahisa Ohsaki
  • Patent number: 6410190
    Abstract: The invention relates to a process for the preparation of organic methanide electrolytes in useable quality for use in electrochemical cells and batteries.
    Type: Grant
    Filed: April 28, 2000
    Date of Patent: June 25, 2002
    Assignee: Merck Patent Gesellschaft mit beschraenkter Haftung
    Inventors: Nikolai Ignatiev, Peter Sartori, Peter Barthen
  • Patent number: 6403256
    Abstract: An alkali metal, solid cathode, nonaqueous electrochemical cell capable of delivering high current pulses, rapidly recovering its open circuit voltage and having high current capacity, is described. The stated benefits are realized by the addition of at least one organic sulfite additive to an electrolyte comprising an alkali metal salt dissolved in a mixture of a low viscosity solvent and a high permittivity solvent. A preferred solvent mixture includes propylene carbonate, dimethoxyethane and a sulfite additive having at least one unsaturated hydrocarbon containing a C(sp2 or sp3)—C(sp3) bond unit having the C(sp3) carbon directly connected to the —OSO2— functional group.
    Type: Grant
    Filed: January 24, 2000
    Date of Patent: June 11, 2002
    Assignee: Wilson Greatbatch Ltd.
    Inventors: Hong Gan, Esther S. Takeuchi
  • Publication number: 20020068222
    Abstract: An electric cell using aluminum in a negative electrode has a positive electrode, the negative electrode containing aluminum or aluminum alloy, and an electrolyte arranged between the positive electrode and the negative electrode. The electrolyte includes: at least one ion selected from a group of a sulfate ion (SO42−) and a nitrate ion (NO3−); and an additive. The additive is selected from an organic acid, a salt of the organic acid, an hydrate of the organic acid, an ester of the organic acid, an ion of the organic acid, and derivatives thereof. Thus, the electric cell of the present invention using aluminum in a negative electrode allows the improvements in the voltage and the capacity of the cell as the generation of gas depending on the self-discharge can be prevented.
    Type: Application
    Filed: September 28, 2001
    Publication date: June 6, 2002
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Haruchika Ishii, Norio Takami, Tomokazu Morita, Mitsuo Kasori
  • Publication number: 20020051912
    Abstract: A composition for prolonging battery life by reducing water loss and the degradation of properties due to dendritic precipitation, is refreshingly added to a battery electrolyte. By the refreshment of the composition, battery cycle life is substantially increased while degradation of the internal battery components is substantially reduced.
    Type: Application
    Filed: March 19, 2001
    Publication date: May 2, 2002
    Inventors: Johan C. Fitter, Robert T. Morris, Richard E. Belmont, John T.C. Kan
  • Publication number: 20020038765
    Abstract: An interchangeable electrolyte contains an additive that promotes interchangeable use between batteries and electroplating cells by limiting dendritic deposition in battery cells and promoting a smooth finish in an electroplating cell, such that fresh or spent electrolyte can be used interchangeably in these type of cells.
    Type: Application
    Filed: August 10, 2001
    Publication date: April 4, 2002
    Inventor: Johan C. Fitter
  • Patent number: 6350542
    Abstract: A lithium ion electrochemical cell having high charge/discharge capacity, long cycle life and exhibiting a reduced first cycle irreversible capacity, is described. The stated benefits are realized by the addition of at least one sulfite additive to an electrolyte comprising an alkali metal salt dissolved in a solvent mixture that includes ethylene carbonate, dimethyl carbonate, ethylmethyl carbonate and diethyl carbonate. The preferred additive is an alkyl sulfite compound.
    Type: Grant
    Filed: January 24, 2000
    Date of Patent: February 26, 2002
    Assignee: Wilson Greatbatch Ltd.
    Inventors: Hong Gan, Esther S. Takeuchi
  • Patent number: 6350546
    Abstract: A lithium ion electrochemical cell having high charge/discharge capacity, long cycle life and exhibiting a reduced first cycle irreversible capacity, is described. The stated benefits are realized by the addition of at least one sulfate additive to an electrolyte comprising an alkali metal salt dissolved in a solvent mixture that includes ethylene carbonate, dimethyl carbonate, ethylmethyl carbonate and diethyl carbonate. The preferred additive is selected from a silyl sulfate, tin sulfate or an organic sulfate.
    Type: Grant
    Filed: March 6, 2000
    Date of Patent: February 26, 2002
    Assignee: Wilson Greatbatch Ltd.
    Inventors: Hong Gan, Esther S. Takeuchi
  • Patent number: 6300016
    Abstract: A polycarbonate electrolyte comprising a polycarbonate membrane matrix and a lithium salt-containing electrolytic solution impregnated into the polycarbonate membrane matrix.
    Type: Grant
    Filed: August 27, 1999
    Date of Patent: October 9, 2001
    Assignee: Industrial Technology Research Institute
    Inventors: Yih-Song Jan, Jong-Ming Lin, Mei-Hui Wang, Sheng-Feng Wu
  • Publication number: 20010008736
    Abstract: Novel sulfonylimide and sulfonylmethide compounds are described which are useful as conductive salts. Also described is the use of the above compounds in salt form in battery electrolytes, particular salts having mixed perfluorocarbon and hydrocarbon groups or having all hydrocarbon groups. The above salts are less expensive to produce and still exhibit excellent conductivity and low corrosivity.
    Type: Application
    Filed: August 25, 1998
    Publication date: July 19, 2001
    Applicant: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: ALAN DAVID FANTA, PHAT TAN PHAM, STEVEN JOSEPH HAMROCK
  • Patent number: 6221534
    Abstract: The present invention is directed to an unexpected benefit in a lithium cell derived from using a combination of silver vanadium oxide prepared in a temperature range of about 450° C. to about 500° C. activated with a nonaqueous electrolyte having a passivation inhibitor additive selected from a nitrite, a nitrate, a carbonate, a dicarbonate, a phosphonate, a phosphate, a sulfate and hydrogen fluoride, and mixtures thereof. The benefits include additional battery life resulting from a reduction in voltage delay and RDC build-up. A preferred electrolyte is 1M LiAsF6 in a 50:50 mixture, by volume, of PC and DME having dibenzyl carbonate added therein.
    Type: Grant
    Filed: November 25, 1998
    Date of Patent: April 24, 2001
    Assignee: Wilson Greatbatch Ltd.
    Inventors: Esther S. Takeuchi, Randolph A. Leising, Hong Gan
  • Patent number: 6197451
    Abstract: The present invention relates to methods and compositions for reducing corrosion and gassing that occurs within lead-acid storage batteries. In particular, combinations of anodic corrosion inhibitors such as hydrolyzed gelatin and water soluble iodides are preferred inhibitors; and these inhibitors provide excellent results when also used in combination with surfactants which are sodium salts of diphenyl sulfonate. Admixtures of anodic corrosion inhibitors, replace the conventional electrolyte solution within the battery.
    Type: Grant
    Filed: April 7, 1998
    Date of Patent: March 6, 2001
    Assignee: Henkel Corporation
    Inventors: Lester Steinbrecher, R. Ashton White, Gerald A. Black
  • Patent number: 6132901
    Abstract: An assembled battery having one or more positive plates, negative plates and separators and sulfuric acid electrolytes having a fluoro aliphatic surfactant present in the electrolyte that improves the utilization efficiency of the battery.
    Type: Grant
    Filed: March 20, 1998
    Date of Patent: October 17, 2000
    Assignee: Ensci Inc
    Inventor: Thomas J. Clough
  • Patent number: 6078007
    Abstract: A selenium photovoltaic cell has a top electrode formed of lemon juice or another fluid which enters into a chemical reaction with the selenium which produces a sulfur compound. A contact disk fixed to the selenium surface makes reliable contact to the fluid top electrode and provides a connection point for a top electrode lead.
    Type: Grant
    Filed: July 26, 1999
    Date of Patent: June 20, 2000
    Inventor: Nicholai Hart Lidow
  • Patent number: 6018124
    Abstract: A selenium photovoltaic cell has a top electrode formed of lemon juice or another fluid which enters into a chemical reaction with the selenium which produces a sulfur compound. A contact disk fixed to the selenium surface makes reliable contact to the fluid top electrode and provides a connection point for a top electrode lead.
    Type: Grant
    Filed: January 15, 1998
    Date of Patent: January 25, 2000
    Inventor: Nicholai Hart Lidow