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61. 发明专利

AT261191T 未知
公开(公告)号：AT261191T
公开(公告)日：2004-03-15
申请号：AT00993800
申请日：2000-12-22
申请人： VALENCE TECHNOLOGY INC
发明人： BARKER JEREMY , SAIDI M YAZID
IPC分类号： C01B25/45 , C01G49/00 , H01M4/02 , H01M4/131 , H01M4/136 , H01M4/1391 , H01M4/48 , H01M4/485 , H01M4/50 , H01M4/505 , H01M4/52 , H01M4/525 , H01M4/58 , H01M10/0525 , H01M10/36 , H01M10/40
摘要： 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.

62. 发明专利

DE69726893D1 未知
公开(公告)号：DE69726893D1
公开(公告)日：2004-01-29
申请号：DE69726893
申请日：1997-09-04
申请人： VALENCE TECHNOLOGY INC
发明人： BARKER JEREMY , SAISI MOHAMED-YAZID
IPC分类号： C01B25/45 , H01M4/02 , H01M4/04 , H01M4/58 , H01M4/583 , H01M4/62 , H01M10/052 , H01M10/0525 , H01M10/36 , H01M4/52 , H01M10/40
摘要： An electrode comprises: (i) an active material composed of a phosphorus compound. In a first condition, the compound has a nominal formula: Li(3-x)E'E''(PO4)3 where x = 0, where at least one of the elements E' and E'' is a metal, and where E' and E'' are the same or different. In a second condition, the compound has a nominal formula as above, where 0 x =3, and where at least one of the elements E' and E'' has an oxidation state higher than that in the phosphorus compound in its first condition. Also claimed is an electrochemical cell consisting of a first electrode and a second counter electrode, where the first electrode comprises a phosphorus compound of nominal formula: Li(3-x)M'M''(PO4)3 where M' and M'' are metallic or semi-metallic elements, and M' and M'' are the same or different. In the case when M' and M'' are the same, they are both transition metals. In the case when M' and M'' are different, at least one is a transition metal. An electrochemical cell consists of a first electrode and a second counter electrode, where the first electrode comprises a phosphorus compound of nominal formula: Li(3-x)E'E''(PO4)3 where E' and E'' are the same or different. In the case when E' and E'' are the same, the element has more than one oxidation state. In the case when E' and E'' are different, they are each independently selected from a group of elements, where at least one of E' and E'' has more than one oxidation state. Further claimed is a method for operating electrochemical cells, by: (a) providing a first electrode (12), comprising a Li-metal-phosphate compound, a second counter electrode (14) and an electrolyte (16) therebetween; (b) electrochemically de-intercalating Li ions from the Li-metal-phosphate compound and transferring the ions to the counter electrode to charge the cell; and (c) electrochemically removing at least a portion of the transferred Li ions from the counter electrode for re-intercalation into the Li-metal-phosphate compound, whereupon electrochemical energy is obtained from the cell during discharge. Another claim is a battery as above, where the Li-metal-phosphate compound is represented by Li(3-x)M'yM''(2-y)(PO4)3 and where, during charge and discharge, the value of x Li ions transferred between the electrode varies as 0+-x+-3.

63. 发明专利

CA2558637A1 SYNTHESIS OF METAL COMPOUNDS USEFUL AS CATHODE ACTIVE MATERIALS 未知
公开(公告)号：CA2558637A1
公开(公告)日：2003-12-04
申请号：CA2558637
申请日：2003-05-06
申请人： VALENCE TECHNOLOGY INC
发明人： SAIDI YAZID M , DONG MING , BARKER JEREMY , SWOYER JEFFREY
IPC分类号： C01B13/14 , C01B25/30 , C01B25/45 , C01D1/02 , C01G31/00 , C01G39/00 , C01G49/00 , H01M4/02 , H01M4/04 , H01M4/485 , H01M4/505 , H01M4/525 , H01M4/58 , H01M10/40
摘要： Active materials of the invention contain at least one alkali metal and at least one other metal capable of being oxidized to a higher oxidation state. Preferred other metals are accordingly selected from the group consisting of transitio n metals (defined as Groups 4-11 of the periodic table), as well as certain other non - transition metals such as tin, bismuth, and lead. The active materials may be synthesiz ed in single step reactions or in multi-step reactions. In at least one of the ste ps of the synthesis reaction, reducing carbon is used as a starting material. In one aspect, the reducing carbon is provided by elemental carbon, preferably in particulate form such as graphites, amorphous carbon, carbon blacks and the like. In another aspec t, reducing carbon may also be provided by an organic precursor material, or by a mixture of elemental carbon and organic precursor material.

64. 发明专利

AU2003217990A1 ALKALI/TRANSITION METAL PHOSPHATES AND RELATED ELECTRODE ACTIVE MATERIALS 未知
公开(公告)号：AU2003217990A1
公开(公告)日：2003-09-22
申请号：AU2003217990
申请日：2003-03-05
申请人： VALENCE TECHNOLOGY INC
发明人： BARKER JEREMY , SAIDI M YAZID , SWOYER JEFFREY L
IPC分类号： C01B33/20 , H01M2/16 , H01M4/131 , H01M4/136 , H01M4/48 , H01M4/485 , H01M4/50 , H01M4/505 , H01M4/52 , H01M4/525 , H01M4/58 , H01M6/16 , H01M6/40 , H01M10/0525 , H01M10/0565 , H01M10/36
摘要： Electrode active material comprising a compound of the formula A a + x ¢ M¹ 1 + x / 2 ¢ M ¢ º 1 - a / 2 ¢ P 1 - x ¢ S ¢ i x ¢ O 4 , wherein (a) A is selected from the group consisting of Li, Na, K, and mixtures thereof, where 0

65. 发明专利

AU764110B2 Lithium-containing phosphate active materials 未知
公开(公告)号：AU764110B2
公开(公告)日：2003-08-07
申请号：AU4168000
申请日：2000-02-22
申请人： VALENCE TECHNOLOGY INC
发明人： BARKER JEREMY
IPC分类号： C01B25/455 , H01M4/133 , H01M4/136 , H01M4/58 , H01M10/0525 , H01M10/0585 , H01M10/36 , C01B25/30 , H01M4/48
摘要： The invention provides novel lithium-containing phosphate materials having a high proportion of lithium per formula unit of the material. Upon electrochemical interaction, such material deintercalates lithium ions, and is capable of reversibly cycling lithium ions. The invention provides a rechargeable lithium battery which comprises an electrode formed from the novel lithium-containing phosphates.

66. 发明专利

DE69720777D1 未知
公开(公告)号：DE69720777D1
公开(公告)日：2003-05-15
申请号：DE69720777
申请日：1997-11-21
申请人： VALENCE TECHNOLOGY INC
发明人： SAIDI MOHAMED-YAZID , SCORDILIS-KELLEY CHARICLEA , BARKER JEREMY
IPC分类号： C01G45/00 , H01M4/50 , H01M4/505 , H01M4/62 , H01M10/0525 , H01M10/0567 , H01M10/36 , H01M10/40
摘要： The present invention provides a novel composition and method for preventing decomposition of one or more electrochemical cell components comprising an electrode having an active material, and an electrolyte. The method of the invention, for the first time, effectively overcomes problems which arise between the interaction of cell components and contaminate water retained in a cell. Such contaminate water reacts with the electrolyte which comprises a salt of lithium in a solvent. Solubilizing of the salt in solution with attendant interaction between the salt and water causes formation of hydrogen-containing acids. The method of the invention effectively blocks decomposition of a lithium metal oxide cathode active material, and particularly lithium manganese oxide (LMO, nominally LiMn2O4). Such decomposition is prevented by including in the cell a basic compound which forms an electron donor species in the electrolyte solution; and by neutralizing at least a portion of the acid by reacting the donor species with the hydrogen-containing acids thereby preventing decomposition of the lithium manganese oxide by the acid. The preservation of the lithium manganese oxide prevents degradation of other cell components by other mechanism.

67. 发明专利

ES2169425T3 未知
公开(公告)号：ES2169425T3
公开(公告)日：2002-07-01
申请号：ES97942393
申请日：1997-09-04
申请人： VALENCE TECHNOLOGY INC
发明人： BARKER JEREMY , SAIDI MOHAMED-YAZID
IPC分类号： C01B25/45 , H01M4/02 , H01M4/04 , H01M4/58 , H01M4/583 , H01M4/62 , H01M10/052 , H01M10/0525 , H01M10/36 , H01M4/52 , H01M10/40
摘要： An electrode comprises: (i) an active material composed of a phosphorus compound. In a first condition, the compound has a nominal formula: Li(3-x)E'E''(PO4)3 where x = 0, where at least one of the elements E' and E'' is a metal, and where E' and E'' are the same or different. In a second condition, the compound has a nominal formula as above, where 0 x =3, and where at least one of the elements E' and E'' has an oxidation state higher than that in the phosphorus compound in its first condition. Also claimed is an electrochemical cell consisting of a first electrode and a second counter electrode, where the first electrode comprises a phosphorus compound of nominal formula: Li(3-x)M'M''(PO4)3 where M' and M'' are metallic or semi-metallic elements, and M' and M'' are the same or different. In the case when M' and M'' are the same, they are both transition metals. In the case when M' and M'' are different, at least one is a transition metal. An electrochemical cell consists of a first electrode and a second counter electrode, where the first electrode comprises a phosphorus compound of nominal formula: Li(3-x)E'E''(PO4)3 where E' and E'' are the same or different. In the case when E' and E'' are the same, the element has more than one oxidation state. In the case when E' and E'' are different, they are each independently selected from a group of elements, where at least one of E' and E'' has more than one oxidation state. Further claimed is a method for operating electrochemical cells, by: (a) providing a first electrode (12), comprising a Li-metal-phosphate compound, a second counter electrode (14) and an electrolyte (16) therebetween; (b) electrochemically de-intercalating Li ions from the Li-metal-phosphate compound and transferring the ions to the counter electrode to charge the cell; and (c) electrochemically removing at least a portion of the transferred Li ions from the counter electrode for re-intercalation into the Li-metal-phosphate compound, whereupon electrochemical energy is obtained from the cell during discharge. Another claim is a battery as above, where the Li-metal-phosphate compound is represented by Li(3-x)M'yM''(2-y)(PO4)3 and where, during charge and discharge, the value of x Li ions transferred between the electrode varies as 0+-x+-3.

68. 发明专利

CA2428201A1 METHODS OF MAKING LITHIUM METAL COMPOUNDS USEFUL AS CATHODE ACTIVE MATERIALS 未知
公开(公告)号：CA2428201A1
公开(公告)日：2002-06-06
申请号：CA2428201
申请日：2001-11-19
申请人： VALENCE TECHNOLOGY INC
发明人： YAZID SAIDI M , SWOYER JEFFREY L , BARKER JEREMY
IPC分类号： C01B25/00 , C01B25/45 , C01B25/455 , C01G31/00 , H01M4/02 , H01M4/48 , H01M4/485 , H01M4/50 , H01M4/505 , H01M4/52 , H01M4/525 , H01M4/58 , H01M10/052 , H01M10/36
摘要： The invention provides a novel method for making lithium mixed metal materials in electrochemical cells. The lithium mixed metal materials comrise lithium and aat least one other metal besides lithium. The invnetion involves the reaction of a metal compound, a phosphate compound, with a reducing agent to reduce the mettal and form a metal phosphate. The invention also includes methods of making lithium metal oxides involving reaction of a lithium compound, a metal oxide with a reducing agent.

69. 发明专利

AU4364701A Lithium metal fluorophosphate materials and preparation thereof 未知
公开(公告)号：AU4364701A
公开(公告)日：2001-11-12
申请号：AU4364701
申请日：2001-03-14
申请人： VALENCE TECHNOLOGY INC
发明人： BARKER JEREMY , SAIDI YAZID M , SWOYER JEFFREY L
IPC分类号： C01B25/455 , H01M4/02 , H01M4/58 , H01M10/0525 , H01M10/36 , C01B25/26
摘要： 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.

70. 发明专利

CA2407617A1 LITHIUM METAL FLUOROPHOSPHATE MATERIALS AND PREPARATION THEREOF 未知
公开(公告)号：CA2407617A1
公开(公告)日：2001-11-08
申请号：CA2407617
申请日：2001-03-14
申请人： VALENCE TECHNOLOGY INC
发明人： BARKER JEREMY , SAIDI YAZID M , SWOYER JEFFREY L
IPC分类号： C01B25/455 , H01M4/02 , H01M4/58 , H01M10/0525 , H01M10/36 , C01B25/26
摘要： 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 lithi um 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.

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