Jeremy Lynn Barker

US Patent:

6387568, May 14, 2002

Filed:

Apr 27, 2000

Appl. No.:

09/559861

Inventors:

Jeremy Barker - Redmond WA
M. Yazid Saidi - Redmond WA
Jeffrey Swoyer - Bellevue WA

Assignee:

Valence Technology, Inc. - Henderson NV

International Classification:

H01M 458

US Classification:

4292181, 4292311

Abstract:

The invention provides new and novel lithium-metal-fluorophosphates which, upon electrochemical interaction, release lithium ions, and are capable of reversibly cycling lithium ions. The invention provides a rechargeable lithium battery which comprises an electrode formed from the novel lithium-metal-fluorophosphates. The lithium-metal-fluorophosphates comprise lithium and at least one other metal besides lithium.

US Patent:

6392385, May 21, 2002

Filed:

Dec 1, 1999

Appl. No.:

09/452267

Inventors:

Jeremy Barker - Redmond WA 98052
Feng Gao - Laurel MD 20733

International Classification:

H01M 1044

US Classification:

320130, 320131

Abstract:

The present invention provides a method for cycling a battery, containing lithium metal oxide, particularly lithium manganese oxide (LMO) active material, in a cell in a manner which reduces the extent to which loss of capacity occurs. The present method of operation extends the cycle life of such battery.

US Patent:

6444370, Sep 3, 2002

Filed:

Nov 20, 1998

Appl. No.:

09/196882

Inventors:

Jeremy Barker - Redmond WA
Feng Gao - Henderson NV
Arnold Stux - Baltimore MD

Assignee:

Valence Technology, Inc. - Henderson NV

International Classification:

H01M 616

US Classification:

429332

Abstract:

The present invention provides a novel electrolyte solvent which is usable with a variety of carbonaceous and metal oxide electrode active materials, providing improved performance over a broad temperature range, and which is stabilized to maintain cell capacity over a number of cycles.

US Patent:

6447951, Sep 10, 2002

Filed:

Nov 19, 1998

Appl. No.:

09/195961

Inventors:

Jeremy Barker - Redmond WA
M. Yazid Saidi - Redmond WA

Assignee:

Valence Technology, Inc. - Henderson NV

International Classification:

H01M 458

US Classification:

4292181, 4292311

Abstract:

The invention provides an electrochemical cell which comprises an electrode having a lithium metal phosphorous compound.

US Patent:

6468690, Oct 22, 2002

Filed:

Mar 23, 2000

Appl. No.:

09/423671

Inventors:

Jeremy Barker - Redmond WA
Steven D. Cochran - Fishers IN

Assignee:

Valence Technology, Inc. - Henderson NV

International Classification:

H01M 1004

US Classification:

429162, 429185, 429249, 205 59, 296232

Abstract:

Conditioning secondary lithium ion cells at elevated temperatures above ambient reduces the time required to complete this process and produces cells and batteries which demonstrate improved electrochemical performance. Conditioning includes subjecting an electrochemical cell to at least one full charge/discharge cycle whereby gases generated and removed before the cell is sealed and ready for use. The cell is placed in an environment that is maintained at a temperature of at least 30Â C. , charged and discharged, and sealed.

US Patent:

6468695, Oct 22, 2002

Filed:

Aug 18, 1999

Appl. No.:

09/376914

Inventors:

Jeremy Barker - Redmond WA

Assignee:

Valence Technology Inc. - Henderson NV

International Classification:

H01M 450

US Classification:

429224, 4292311

Abstract:

In one embodiment, the invention provides a novel composition which is stabilized against decomposition when used as an active material for an electrochemical cell. The active material of the present invention comprises particles of spinel lithium manganese oxide (LMO) enriched with lithium by a decomposition product of lithium hydroxide forming a part of each of the LMO particles. The spinel LMO product formed by the decomposition of lithium hydroxide in the presence of the LMO is characterized by a reduced surface area and increased capacity retention (reduced capacity fading) as compared to the initial, non-treated, non-enriched spinel. In another aspect, the treated spinel LMO product is combined with lithium carbonate in a cathode mixture.

US Patent:

6528033, Mar 4, 2003

Filed:

Jan 18, 2000

Appl. No.:

09/484919

Inventors:

Jeremy Barker - Redmond WA
M. Yazid Saidi - Redmond WA
Jeffrey Swoyer - Bellevue WA

Assignee:

Valence Technology, Inc. - Henderson NV

International Classification:

C01B 2526

US Classification:

423306, 423593, 423594, 423596, 423598, 423599, 4231795

Abstract:

The invention provides novel lithium-mixed metal materials which, upon electrochemical interaction, release lithium ions, and are capable of reversibly cycling lithium ions. The invention provides a rechargeable lithium battery which comprises an electrode formed from the novel lithium-mixed metal materials. Methods for making the novel lithium-mixed metal materials and methods for using such lithium-mixed metal materials in electrochemical cells are also provided. The lithium-mixed metal materials comprise lithium and at least one other metal besides lithium. Preferred materials are lithium-mixed metal phosphates which contain lithium and two other metals besides lithium.

US Patent:

6555026, Apr 29, 2003

Filed:

Nov 6, 2000

Appl. No.:

09/707100

Inventors:

Jeremy Barker - Redmond WA
M. Yazid Saidi - Redmond WA

Assignee:

Valence Technology, Inc. - Henderson NV

International Classification:

H01B 108

US Classification:

2525191

Abstract:

A composition and a method for forming the composition stabilized against capacity degradation comprises particles of spinel lithium manganese oxide (LMO) enriched with lithium by a decomposition product of lithium carbonate forming a part of each said particle and characterized by a reduced surface area and increased capacity expressed in milliamp hours per gram as compared to non-enriched spinel.