Lithium electrochemical generator comprising at least a bipolar electrode with conductive aluminium or aluminium alloy substrates
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H01M-004/04
H01M-004/66
출원번호
US-0495733
(2002-11-27)
등록번호
US-7326493
(2008-02-05)
우선권정보
FR-01 15377(2001-11-28)
국제출원번호
PCT/FR02/004066
(2002-11-27)
§371/§102 date
20040514
(20040514)
국제공개번호
WO03/047021
(2003-06-05)
발명자
/ 주소
Martinet,S��bastien
Le Cras,Fr��d��ric
출원인 / 주소
Commissariat a l'Energie Atomique
대리인 / 주소
Pearne & Gordon LLP
인용정보
피인용 횟수 :
6인용 특허 :
3
초록▼
The subject of the present invention is a lithium electrochemical generator comprising two peripheral electrodes--one positive and the other negative--each comprising an electrically conductive substrate (13, 21) and an active layer (14, 20) that includes an active material, at least one bipolar ele
The subject of the present invention is a lithium electrochemical generator comprising two peripheral electrodes--one positive and the other negative--each comprising an electrically conductive substrate (13, 21) and an active layer (14, 20) that includes an active material, at least one bipolar electrode comprising a positive active layer (18) on a first electrically conductive substrate and a negative active layer (16) on a second electrically conductive substrate, the said substrates being fixed together and two separators (15, 19) flanking each bipolar electrode, in which generator the electrically conductive substrates of each bipolar electrode are made of identical or different materials chosen from aluminium and its alloys and the negative active material of the bipolar electrode prevents an aluminium alloy being obtained with the electrically conductive substrates, under the operating conditions of the storage battery.
대표청구항▼
The invention claimed is: 1. Lithium electrochemical generator comprising: a positive peripheral electrode comprising an electrically conductive substrate to which a positive active layer, including a positive active material, adheres; a negative peripheral electrode comprising an electrically cond
The invention claimed is: 1. Lithium electrochemical generator comprising: a positive peripheral electrode comprising an electrically conductive substrate to which a positive active layer, including a positive active material, adheres; a negative peripheral electrode comprising an electrically conductive substrate to which a negative active layer, including a negative active material, adheres; the positive peripheral electrode and the negative peripheral electrode being respectively located at opposite ends of the generator; at least one bipolar electrode comprising a positive active layer, including a positive active material, which adheres to a first electrically conductive substrate and comprising a negative active layer, including a negative active material, which adheres to a second electrically conductive substrate, the said first and second substrates being fixed together or forming a single substrate; two separators that are lithium ion conductors but electronic insulators, which flank each bipolar electrode; the said generator being characterized in that the said first and second electrically conductive substrates of the at least one bipolar electrode are made of identical or different materials chosen from the group formed by aluminium and its alloys and in that the negative active material of the negative active layer of the at least one bipolar electrode is a material not capable of forming an aluminium-lithium alloy with the material of the said second electrically conductive substrate. 2. Lithium electrochemical generator according to claim 1, characterized in that the negative active material of the at least one bipolar electrode has a potential for the intercalation of lithium into the said material above the potential for the formation of an aluminium-lithium alloy. 3. Lithium electrochemical generator according to claim 2, characterized in that the potential for intercalation of lithium into the negative active material of the at least one bipolar electrode is greater than 0.25 V. 4. Lithium electrochemical generator according to claim 1, characterized in that the electrically conductive substrate of at least one of the peripheral electrodes is made of a material chosen from a group consisting of aluminium and aluminium alloys. 5. Lithium electrochemical generator according to claim 1, characterized in that the negative active material of the at least one bipolar electrode is Li4Ti5O12. 6. Lithium electrochemical generator according to claim 1, characterized in that the positive active material of the at least one bipolar electrode is chosen from a group consisting of transition metal phosphates or orthosilicates, carbon, transition metal oxides, whether substituted or not, and mixtures thereof. 7. Lithium electrochemical generator according to claim 6, characterized in that the transition metal phosphate is chosen from the group formed by LiFex1Mn1-x1PO4 where 0≦x1≦1 and LiCoPO4 and mixtures thereof. 8. Lithium electrochemical generator according to claim 6, characterized in that the transition metal oxide is chosen from the group formed by LiMx2M'x3Mn2-x2-x3O4 where 0≦x2≦0.33 and 0≦x3≦0.5, M denoting Li or Mg or M' denoting a transition metal chosen from the group consisting of Ni, Co, Fe and Cr, LiCox4Ni1-x4O2 where 0≦x4≦1, LiAlx5Ni1-x5O2 where 0≦x5≦0.25, and mixtures thereof. 9. Lithium electrochemical generator according to claim 6, characterized in that the transition metal oxide is Li1+εMn2-εO4 where 0≦ε≦0.33. 10. Lithium electrochemical generator according to claim 1, characterized in that the positive active material of the at least one bipolar electrode is an adsorptively active material. 11. Lithium electrochemical generator according to claim 10, characterized in that the positive active material is an active carbon. 12. Lithium electrochemical generator according to claim 1, characterized in that the separators are formed from a porous element containing a liquid lithium-ion conductive electrolyte. 13. Lithium electrochemical generator according to claim 1, characterized in that the separators are formed from a polymeric electrolyte containing a lithium salt. 14. Lithium electrochemical generator according to claim 1, characterized in that the separators are formed from an inorganic lithium-ion conductive material chosen from the group formed by lithium phosphates and borates. 15. Electrochemical generator according to claim 14, characterized in that the inorganic lithiumion conductive material is Li3PO2,5N0,3. 16. Electrochemical generator according to claim 1, characterized in that the separators comprise a molten lithium salt. 17. Electrochemical generator according to claim 1, characterized in that the separators are formed by an ionic liquid containing a dissolved lithium salt. 18. Lithium electrochemical generator according to claim 17, characterized in that the ionic liquid is chosen from the group formed by imidazolium salts, dialkylimidazolium salts, alkylpyridinium salts, dialkylpyridinium salts, chloroaluminate salts and alkylchloroaluminate salts. 19. Electrochemical generator according to claim 1, characterized in that all the electrically conductive substrates are made of aluminium and in that all the negative active materials of the said generator are formed from the same material, and all the positive active materials of the said generator are formed from the same material.
Williams Mark T. (Hampstead MD) Briscoe James D. (Westminister MD) Oweis Salah M. (Ellicott City MD), Stacked cell array bipolar battery with thermal sprayed container and cell seal.
West, Jon Kenneth; Higgins, Martin Patrick; Regalado, Julius; George, Anthony, Dish shaped and pressure equalizing electrodes for electrochemical batteries.
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