Thin-film batteries with polymer and LiPON electrolyte layers and method
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H01M-006/14
H01M-006/18
출원번호
UP-0458093
(2006-07-17)
등록번호
US-7776478
(2010-09-06)
발명자
/ 주소
Klaassen, Jody J.
출원인 / 주소
Cymbet Corporation
인용정보
피인용 횟수 :
19인용 특허 :
190
초록▼
A method and apparatus for making thin-film batteries having composite multi-layered electrolytes with soft electrolyte between hard electrolyte covering the negative and/or positive electrode, and the resulting batteries. In some embodiments, foil-core cathode sheets each having a cathode material
A method and apparatus for making thin-film batteries having composite multi-layered electrolytes with soft electrolyte between hard electrolyte covering the negative and/or positive electrode, and the resulting batteries. In some embodiments, foil-core cathode sheets each having a cathode material (e.g., LiCoO2) covered by a hard electrolyte on both sides, and foil-core anode sheets having an anode material (e.g., lithium metal) covered by a hard electrolyte on both sides, are laminated using a soft (e.g., polymer gel) electrolyte sandwiched between alternating cathode and anode sheets. A hard glass-like electrolyte layer obtains a smooth hard positive-electrode lithium-metal layer upon charging, but when very thin, have randomly spaced pinholes/defects. When the hard layers are formed on both the positive and negative electrodes, one electrode's dendrite-short-causing defects on are not aligned with the other electrode's defects. The soft electrolyte layer both conducts ions across the gap between hard electrolyte layers and fills pinholes.
대표청구항▼
What is claimed is: 1. A battery cell having a negative electrode, a positive electrode, and an electrolyte structure, wherein the negative electrode includes a first LiPON layer covering at least a portion of the negative electrode and having randomly spaced defects; the positive electrode include
What is claimed is: 1. A battery cell having a negative electrode, a positive electrode, and an electrolyte structure, wherein the negative electrode includes a first LiPON layer covering at least a portion of the negative electrode and having randomly spaced defects; the positive electrode includes a cathode material and a second LiPON layer covering at least a portion of the positive electrode and having randomly spaced defects; and the electrolyte structure includes a polymer electrolyte material sandwiched between the LiPON layer of the negative electrode and the LiPON layer of the positive electrode, wherein the randomly spaced defects in the first and second LiPON layers are at least partially filled by the polymer electrolyte material and wherein the polymer electrolyte layer fixes defects in at least one of the LiPON layers, wherein the polymer electrolyte layer includes a gel. 2. The battery cell of claim 1, wherein the cathode material includes LiCoO2 that is deposited on a positive electrode current-collector material, and the LiPON layer of the positive electrode is deposited on the LiCoO2. 3. The battery cell of claim 2 wherein the positive electrode current-collector material includes a metal mesh around which the cathode material is deposited. 4. The battery cell of claim 1, wherein the negative electrode includes a negative-electrode current collector made of a metal that does not readily alloy with lithium during a plating operation, and lithium metal is plated onto the negative-electrode current collector through the LiPON layer covering the negative electrode. 5. The battery cell of claim 4, wherein the metal of the negative-electrode current collector includes copper. 6. The battery cell of claim 4, wherein the negative electrode includes a mask layer that covers a periphery of the negative-electrode current collector and lithium metal is plated through the LiPON layer covering the negative electrode onto an area of the metal negative-electrode current collector defined by the mask. 7. The battery cell of claim 1, wherein: the negative electrode includes a current-collector metal layer and an anode material, and the anode material includes lithium metal deposited on at least one of two major faces of the metal layer, which is at least partially covered by the LiPON layer of the negative electrode. 8. The battery cell of claim 7, wherein: the anode material is deposited on both major faces of the metal layer of the negative electrode, each face at least partially covered by the LiPON layer of the negative electrode. 9. The battery cell of claim 1, wherein: the positive electrode includes a current-collector metal layer, and the cathode material is deposited on both major faces of the metal layer and is at least partially covered by the LiPON layer. 10. The battery cell of claim 1, wherein: the negative electrode includes a current-collector metal layer and an anode material, and the anode material includes lithium metal plated onto both major faces of the negative-electrode current-collector metal layer through the LiPON layer covering the negative electrode. 11. The battery cell of claim 1, wherein the polymer electrolyte layer includes a polyvinylidene difluoride, propylene carbonate, and a lithium salt. 12. The battery cell of claim 1, wherein: the negative electrode includes a current-collector contact foil coated on a first major face with an anode material and the LiPON layer of the negative electrode, the lithium anode material includes lithium metal plated onto a first major face of the current-collector contact foil through the LiPON layer covering the current-collector contact foil, lithium cathode material of a second battery cell is deposited onto a second major face of the current-collector contact foil of the negative electrode of the first battery cell, and a LiPON layer covering the cathode material of the second battery cell is then deposited by sputtering. 13. The battery cell of claim 1, wherein the positive electrode includes a current-collector foil, the lithium cathode material is deposited onto both major faces of the positive electrode current-collector contact foil, and the LiPON barrier/electrolyte layer covering the positive electrode is then deposited by sputtering on both major faces of the positive electrode. 14. The battery cell of claim 1, wherein the positive electrode includes a current-collector contact mesh, the lithium cathode material is deposited onto both major faces of the cathode current-collector contact mesh, and the LiPON barrier/electrolyte layer covering the positive electrode is then deposited by sputtering on both major faces of the positive electrode. 15. The battery cell of claim 1, further comprising: an encapsulating material surrounding the battery cell; and one or more electrical leads connecting from the battery cell to an exterior of the encapsulating material. 16. The battery cell of claim 1, further comprising: an electronic device; and a housing holding the electronic device, wherein the battery cell is within the housing and supplies power to the electronic device. 17. A battery cell comprising: a first sheet that includes a first LiPON layer covering a first face of the first sheet, the first LiPON layer having defects therein; a second sheet that includes a cathode material that includes lithium and a second LiPON layer covering the cathode material on a second face of the second sheet, the second LiPON layer having defects therein; and means for at least partially filling and fixing the defects of the first and second LiPON layers and for passing lithium ions between the first LiPON layer and the second LiPON layer to form a first battery cell, wherein the means for at least partially filling and fixing defect of the first and second LiPON layers includes a polymer electrolyte layer including a gel. 18. The battery cell of claim 17, wherein the second sheet includes a cathode material that includes lithium and a LiPON layer on a first face of the second sheet, the battery cell further comprising: a third sheet that includes a LiPON layer covering a first face and second face of the third sheet; a fourth sheet that includes a cathode material that includes lithium and a LiPON layer covering the cathode material on a second face of the fourth sheet and a cathode material that includes lithium and a LiPON layer covering the cathode material on a first face of the fourth sheet; means for passing ions between the UPON layer on the first face of the third sheet and the LiPON layer on the second face of the fourth sheet to form a second battery cell; and means for passing ions between the LiPON layer on the first face of the second sheet and the LiPON layer on the second face of the third sheet to form a third battery cell. 19. The battery cell of claim 17, wherein the first sheet includes a copper anode current-collector layer; and the anode material includes lithium deposited as a lithium-metal layer on the copper anode current-collector layer through the LiPON layer of the first sheet. 20. The battery cell of claim 19, wherein a periphery of the lithium-metal layer is defined by a mask, and the deposition of a lithium anode is done by electroplating in a liquid-solvent/lithium-salt electrolyte solution. 21. The battery cell of claim 17, wherein the first sheet includes a cathode material on a second face opposite the anode material on the first face and a LiPON layer covering the cathode material of the first sheet, the battery cell further comprising: a third sheet having an anode material that includes lithium and a LiPON layer covering the anode material on a first face of the third sheet; and means for passing ions between the LiPON layer on the second face of the first sheet and the LiPON layer on the first face of the third sheet to form a series-connected pair of battery cells. 22. The battery cell of claim 17, further comprising: an encapsulating material surrounding the battery cell; and one or more electrical leads connecting from the battery cell to an exterior of the encapsulating material. 23. The battery cell of claim 17, further comprising: an electronic device; and a housing holding the electronic device, wherein the battery cell is within the housing and supplies power to the electronic device. 24. The battery cell of claim 17, wherein the negative electrode component comprises a current collector onto which is deposited an anode material.
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