Daniel Lee Irvin

US Patent:

8394291, Mar 12, 2013

Filed:

Dec 17, 2009

Appl. No.:

12/640894

Inventors:

Zhenhua Mao - Ponca City OK, US
Mark W. Carel - Ponca City OK, US
Daniel H. Irvin - Fulshear TX, US
David W. Westphal - Houston TX, US

Assignee:

Phillips 66 Company - Houston TX

International Classification:

H01M 4/88
H01B 1/02

US Classification:

2521821, 296235, 2525181, 25251951, 25252021, 2525204, 2525212, 423306, 423641, 427215

Abstract:

Processes produce a lithium vanadium fluorophosphate or a carbon-containing lithium vanadium fluorophosphate. Such processes include forming a solution-suspension of precursors having Vthat is to be reduced to V. The solution-suspension is heated in an inert environment to drive synthesis of LiVPOF such that carbon-residue-forming material is also oxidized to precipitate in and on the LiVPOF forming carbon-containing LiVPOF or CLVPF. Liquids are separated from solids and a resulting dry powder is heated to a second higher temperature to drive crystallization of a product. The product includes carbon for conductivity, is created with low cost precursors, and retains a small particle size without need for milling or other processing to reduce the product to a particle size suitable for use in batteries. Furthermore, the process does not rely on addition of carbon black, graphite or other form of carbon to provide the conductivity required for use in batteries.

US Patent:

20100154206, Jun 24, 2010

Filed:

Dec 19, 2008

Appl. No.:

12/339846

Inventors:

Zhenhua Mao - Ponca City OK, US
Daniel H. Irvin - Fulshear TX, US
Mark W. Carel - Ponca City OK, US
Edward J. Nanni - Ponca City OK, US
Edward G. Latimer - Ponca City OK, US
James B. Kimble - Monument CO, US

Assignee:

CONOCOPHILLIPS COMPANY - Houston TX

International Classification:

H01M 4/82
H01B 1/06

US Classification:

296235, 2525204, 252513, 25251951, 25252021, 2525212, 2525181

Abstract:

This invention relates to lithium-ion batteries and cathode powders for making lithium-ion batteries where the cathode powder comprises a blend or mixture of at least one lithium transition metal poly-anion and with one or more lithium transition-metal oxide powders. A number of different lithium transition-metal oxides are suitable, especially formulations that include nickel, manganese and cobalt. The preferred lithium transition metal poly-anion is carbon-containing lithium vanadium phosphate. Batteries using the mixture or blend of these powders have been found to have high specific capacity, especially based on volume, high cycle life, substantially improved safety issues as compared to lithium transition-metal oxides, per se, and an attractive electrode potential profile.