Reaction methods for producing metal oxide particles

Details Reaction methods for producing metal oxide particles Reaction methods for producing metal oxide particles

2000-10-26

2004-01-20

Bos, Steven (Department: 1754)

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

C423S593100, C423S605000

Reexamination Certificate

active

06680041

ABSTRACT:

FIELD OF THE INVENTION
The invention relates to metal oxide powders. More particularly, the invention relates to nanoscale metal oxide particles, such as manganese oxide particles, produced by laser pyrolysis. The invention further relates to methods for producing metal oxide powders with laser pyrolysis and aerosol precursors.
BACKGROUND OF THE INVENTION
Advances in a variety of fields have created a demand for many types of new materials. In particular, a variety of chemical powders can be used in many different processing contexts. Specifically, there is considerable interest in the application of ultrafine or nanoscale powders that are particularly advantageous for a variety of applications involving small structures or high surface area materials. This demand for ultrafine chemical powders has resulted in the development of sophisticated techniques, such as laser pyrolysis, for the production of these powders.
Manganese can exist in various oxidation states. Correspondingly, manganese oxides are known to exist with various stoichiometries. In addition, manganese oxides with a particular stoichiometry can have various crystalline lattices, or they can be amorphous. Thus, manganese oxides exhibit an extraordinarily rich phase diagram.
Manganese oxides with various stoichiometries have been noted as promising materials for use in lithium based batteries. Appropriate manganese oxides can intercalate lithium ions into their crystal structure. Because of the interest in manganese oxides, several approaches have been developed for producing manganese oxides. Other metal oxide powders are useful in the production of batteries as well as a variety of other applications.
SUMMARY OF THE INVENTION
In a first aspect, the invention pertains to a collection of particles comprising manganese oxide, the collection of particles having an average diameter less than about 500 nm, the manganese oxide having a structure selected from the group consisting of amorphous manganese oxide, c-ystalline MnO, crystalline Mn
5
O
8
and crystalline Mn
2
O
3
.
In another aspect, the invention pertains to a method of producing a metal oxide powder, the method comprising reacting an aerosol within a reaction chamber to form metal oxide particles, the aerosol comprising a metal precursor and the metal oxide particles having an average diameter less than about 500 nm.
In a further aspect, the invention pertains to a method for altering the stoichiometry of a collection of manganese oxide particles, the method comprising heating manganese oxide particles in an oxidizing environment at a temperature less than about 600° C.
In another aspect, the invention pertains to a battery having a cathode comprising manganese oxide particles, said manganese oxide particles having an average diameter less than about 250 nm.


REFERENCES:
patent: 4687643 (1987-08-01), Cortesi et al.
patent: 4975346 (1990-12-01), Lecerf et al.
patent: 4980251 (1990-12-01), Thackeray et al.
patent: 5013706 (1991-05-01), Schramm et al.
patent: 5152973 (1992-10-01), Spencer
patent: 5312611 (1994-05-01), Takami et al.
patent: 5326545 (1994-07-01), Koksbang et al.
patent: 5348726 (1994-09-01), Wang et al.
patent: 5356842 (1994-10-01), Yamakawa et al.
patent: 5358695 (1994-10-01), Helble et al.
patent: 5425932 (1995-06-01), Tarascon
patent: 5443809 (1995-08-01), Olsen
patent: 5443930 (1995-08-01), Shoji et al.
patent: 5478672 (1995-12-01), Mitate
patent: 5478675 (1995-12-01), Nagaura
patent: 5496664 (1996-03-01), Sterr
patent: 5523073 (1996-06-01), Sumida et al.
patent: 5545393 (1996-08-01), O'Young et al.
patent: 5549973 (1996-08-01), Majetich et al.
patent: 5585020 (1996-12-01), Becker et al.
patent: 5589300 (1996-12-01), Fauteux et al.
patent: 5601796 (1997-02-01), Frech et al.
patent: 5604057 (1997-02-01), Nazri
patent: 5614472 (1997-03-01), Riddle et al.
patent: 5622750 (1997-04-01), Killian et al.
patent: 5637545 (1997-06-01), Lewis
patent: 5641465 (1997-06-01), Ellgen et al.
patent: 5641468 (1997-06-01), Ellgen
patent: 5665664 (1997-09-01), Tomioka et al.
patent: 5672329 (1997-09-01), Okada et al.
patent: 5674644 (1997-10-01), Nazri
patent: 5695887 (1997-12-01), Amatucci et al.
patent: 5716737 (1998-02-01), Hasegawa et al.
patent: 5759720 (1998-06-01), Amatucci
patent: 5770018 (1998-06-01), Saidi
patent: 5770126 (1998-06-01), Singh et al.
patent: 5807646 (1998-09-01), Iwata et al.
patent: 5871863 (1999-02-01), Miyasaka
patent: 5874058 (1999-02-01), Sheargold et al.
patent: 5883032 (1999-03-01), Bogdan et al.
patent: 5907066 (1999-05-01), Wachs
patent: 5922247 (1999-07-01), Shoham et al.
patent: 5928622 (1999-07-01), Hwang et al.
patent: 5952125 (1999-09-01), Bi et al.
patent: 5958361 (1999-09-01), Laine et al.
patent: 5965293 (1999-10-01), Idota et al.
patent: 5985237 (1999-11-01), Lu et al.
patent: 5989514 (1999-11-01), Bi et al.
patent: 6068800 (2000-05-01), Singh et al.
patent: 6338809 (2002-01-01), Hampden-Smith et al.
patent: 0 117 755 (1984-05-01), None
patent: 0 492 880 (1992-01-01), None
patent: 0 817 300 (1998-01-01), None
patent: 0 820 113 (1998-01-01), None
patent: 0 837 036 (1998-04-01), None
patent: 3729391 (1989-03-01), None
patent: 2677558 (1992-12-01), None
patent: 2 299 988 (1996-10-01), None
patent: 2296732 (1990-12-01), None
patent: 3-80121 (1991-04-01), None
patent: 4-198028 (1992-07-01), None
patent: 6-275276 (1994-09-01), None
patent: 7-37593 (1995-02-01), None
patent: 7-130361 (1995-05-01), None
patent: 2513418 (1996-04-01), None
patent: 8-124557 (1996-05-01), None
patent: 8-213018 (1996-08-01), None
patent: 8-239222 (1996-09-01), None
patent: 2711624 (1996-10-01), None
patent: 9-124321 (1997-05-01), None
patent: WO 96/12676 (1996-02-01), None
patent: WO 97/37935 (1997-10-01), None
patent: WO 97/20773 (1997-12-01), None
patent: 98/02241 (1998-01-01), None
patent: 98/37961 (1998-09-01), None
Nanocomposite Manganese Ocides for Rechargeable Lithium Batteries, J. Kim and A. Manthira, z,—Texas Materials Institute, The University of Texas at Austin, Austin, Texas 78712, USA, 1998, no month.
Relationship between Chemical Bonding Nature and Electro Chemical Property of LiM2O4Spinel Oxides with Various Particle Sizes: Electrochemical Grafting Concept. J. Phys. Chem. B 1999, 103, 2100-2106, no month.
Modeling a Porous Intercalation Electrode with Two Characteristic Particle Sizes by, Daring et al., J. Electrochem. Soc., vol. 144, No. 12, Dec. 1997, pp. 4201-4207.
Progress in Batteries & Solar Cells, vol. 10 (1991), no month.

Affiliated with

Also associated with

Rating

Reaction methods for producing metal oxide particles does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Reaction methods for producing metal oxide particles, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Reaction methods for producing metal oxide particles will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3229541