Jeremy L Barker

US Patent:

6342320, Jan 29, 2002

Filed:

Feb 27, 1998

Appl. No.:

09/032660

Inventors:

Peikang Liu - Henderson NV
Porter Mitchell - Las Vegas NV
Jeffrey Swoyer - Henderson NV
Jeremy Barker - Henderson NV

Assignee:

Valence Technology, Inc. - Henderson NV

International Classification:

H01M 216

US Classification:

429307, 429212, 429217, 429254

Abstract:

A laminate structure or precursor paste thereof characterized by being formed from a composition comprising a polymeric material and a plasticizer. The plasticizer being at least one compound represented by the following general formula where R is a low alkyl selected from the group consisting of methyl, ethyl, butyl, pentyl and hexyl.

US Patent:

6395431, May 28, 2002

Filed:

Oct 28, 1998

Appl. No.:

09/182392

Inventors:

Feng Gao - Henderson NV
Jeremy Barker - Henderson NV
Hang Shi - Henderson NV
Tracy Kelley - Henderson NV

Assignee:

Valence Technology, Inc. - Henderson NV

International Classification:

H01M 616

US Classification:

429326, 429339

Abstract:

The invention provides an electrochemical cell having an electrolyte which comprises a solute, a solvent, and an additive. The additive is a dialkylamide. The dialkylamide lessens the extent of decomposition of the solute, which is a lithium salt. The ionic species of the lithium salt are thereby preserved. The additive also prevents damage to active material by absorbing excess charge energy below the breakdown potential of the active material.

US Patent:

56702779, Sep 23, 1997

Filed:

Jun 13, 1996

Appl. No.:

8/664092

Inventors:

Jeremy Barker - Henderson NV
M. Yazid Saidi - Henderson NV

Assignee:

Valence Technology, Inc. - Henderson NV

International Classification:

H01M 402

US Classification:

429220

Abstract:

The invention provides a rechargeable lithium battery which comprises an electrolyte; a negative electrode having a compatible active material; and a positive electrode comprising a lithium copper oxide intercalation compound. The positive electrode active material is characterized by an ability to deintercalate lithium ions for intercalation into the negative electrode active material. The lithium copper oxide has a proportion of 2 lithium ions per formula unit of the copper oxide and upon electrochemical interaction with a negative electrode deintercalates lithium ions whereupon the proportion of lithium ions per copper oxide formula unit is less than 2. The lithium copper oxide is a compound represented by the nominal general formula Li. sub. 2 CuO. sub. 2. The lithium copper oxide compound is alternatively represented by the nominal general formula Li. sub. 2-x CuO. sub. 2, signifying its capability to deintercalate lithium.

US Patent:

57801827, Jul 14, 1998

Filed:

Nov 4, 1996

Appl. No.:

8/742398

Inventors:

Jeremy Barker - Henderson NV
Feng Gao - Henderson NV

Assignee:

Valence Technology, Inc. - Henderson NV

International Classification:

H01M 1040

US Classification:

429197

Abstract:

Non-aqueous solid electrochemical cells with improved performance can be fabricated by employing intercalation based carbon anodes comprising graphite, coke, or mixtures thereof, and an electrolyte having an electrolyte solvent formed of propylene carbonate and 4,5-dichloroethylene carbonate. The cells are particularly suited for low temperature applications.

US Patent:

58516964, Dec 22, 1998

Filed:

Jan 29, 1996

Appl. No.:

8/593636

Inventors:

M. Yazid Saidi - Henderson NV
Jeremy Barker - Henderson NV

Assignee:

Valence Technology, Inc. - Henderson NV

International Classification:

H01M 448

US Classification:

429218

Abstract:

The present invention provides an electrochemical cell or battery, which has a nonmetal negative electrode (anode). That is, no solid metal active material is used in the cell. Rather than the conventional solid lithium metal anode, the active material of the new anode comprises a compound of vanadium oxide. Accordingly, the lithium cell of the invention comprises a positive electrode and a negative electrode, where the negative electrode comprises a compound of vanadium oxide which in a fully discharged state is represented by the nominal general formula V. sub. 6 O. sub. 13 or Li. sub. y V. sub. 6 O. sub. 13, y equal to 0; and, in a fully or partially lithiated, fully or partially charged state, is represented by the nominal general formula Li. sub. y V. sub. 6 O. sub. 13, where y is greater than 0 and less than or equal to 8. The unique negative electrode of the invention demonstrates exceptional performance without the disadvantages of metallic lithium negative electrodes.

US Patent:

59103817, Jun 8, 1999

Filed:

Apr 17, 1997

Appl. No.:

8/843910

Inventors:

Jeremy Barker - Las Vegas NV
Feng Gao - Henderson NV
Arnie Stux - Las Vegas NV

International Classification:

H01M 614

US Classification:

429197

Abstract:

The subject invention discloses a novel electrolyte for a solid battery system. Specifically, an electrolyte solvent of chlorinated diethyl carbonates demonstrate good electrochemical stability in conjunction with specific anode and cathode materials. When used with a propylene carbonate co-solvent, it reduces or eliminates the decomposition of propylene carbonate during the first cycle. It is appropriate with a variety of electrolyte salts, and especially with LiBF. sub. 4. Chloro-substituted diethyl carbonates also show good high and low temperature performance in electrochemical cells.

US Patent:

57597154, Jun 2, 1998

Filed:

Sep 27, 1996

Appl. No.:

8/723195

Inventors:

Jeremy Barker - Henderson NV
Jeffrey L. Swoyer - Henderson NV
Feng Gao - Henderson NV

Assignee:

Valence Technology, Inc. - Henderson NV

International Classification:

H01M 1040

US Classification:

429197

Abstract:

The invention provides an electrochemical cell which is at least partially charged and which comprises a first electrode having an active material in particle form consisting essentially of at least partially lithiated graphite. The lithiated graphite particles are prepared by chemically or electrochemically inserting lithium ions into the particles prior to assembly of the cell. A second electrode which is a counter electrode to the first electrode has an active material consisting essentially of vanadium oxide.

US Patent:

60156392, Jan 18, 2000

Filed:

Jan 30, 1998

Appl. No.:

9/016608

Inventors:

Feng Gao - Henderson NV
Jeremy Barker - Henderson NV
Peikang Liu - Henderson NV

Assignee:

Valence Technology, Inc. - Henderson NV

International Classification:

H01M 618

US Classification:

429307

Abstract:

The invention provides a new family of compounds and a method of making the compounds. The new compounds are useful as ion conductive salts, and particularly useful as salts for batteries. The compounds of the invention are prepared from three principal reagents, bis (trifluoromethanesufonyl) methane (CF. sub. 3 SO. sub. 2). sub. 2 CH. sub. 2 ; benzoyl chloride; and pyridine which facilitates reaction and then is removed. A precursor sodium salt (CF. sub. 3 SO. sub. 2). sub. 2 CHNa is first prepared. Then, equimolar amounts of the precursor sodium salt and pyridine are dissolved in anhydrous acetonitrile. A stoichiometric amount of the selected substitute benzoyl chloride is then added drop by drop. After addition of Li. sub. 3 PO. sub. 4, there is pyridine release and formation of the product of the aforesaid two reagents.