[특허]Electrophoretic assembly of electrochemical devices

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	C25D-013/02
출원번호	UP-0108602 (2005-04-18)
등록번호	US-7662265 (2010-04-03)
발명자 / 주소	Chiang, Yet-Ming Hellweg, Benjamin Holman, Richard K. Tobias, Steven M. Kim, Dong-Wan Wartena, Ryan Craig
출원인 / 주소	Massachusetts Institute of Technology A123 Systems, Inc.
대리인 / 주소	Wolf, Greenfield & Sacks, P.C.
인용정보	피인용 횟수 : 20 인용 특허 : 40

초록 ▼

Methods are provided for making bipolar electrochemical devices, such as batteries, using electrophoresis. A bipolar device is assembled by applying a field that creates a physical separation between two active electrode materials, without requiring insertion of a discrete separator film or electrol

Methods are provided for making bipolar electrochemical devices, such as batteries, using electrophoresis. A bipolar device is assembled by applying a field that creates a physical separation between two active electrode materials, without requiring insertion of a discrete separator film or electrolyte layer.

대표청구항 ▼

What is claimed is: 1. A method of assembling a bipolar device including a first terminal and a second terminal comprising: providing the first terminal in a medium; providing particles of a first electroactive material in the medium; providing the second terminal in the medium, the second terminal

What is claimed is: 1. A method of assembling a bipolar device including a first terminal and a second terminal comprising: providing the first terminal in a medium; providing particles of a first electroactive material in the medium; providing the second terminal in the medium, the second terminal electronically connected to a second electroactive material in the medium; generating an electric field causing the particles of the first electroactive material to form an electronically continuous first electrode while creating an electronically insulating separation between the first and second electroactive materials; and preserving the electronically insulating separation between the first and second electroactive materials. 2. The method of claim 1, wherein the electrical field is generated by applying an electrical potential between the first terminal and the second terminal. 3. The method of claim 1, wherein the electrical field is generated by applying an electrical potential between one of the first and second terminals and a third terminal. 4. The method of claim 1, wherein the electrical field attracts particles of the first electroactive material to the first terminal. 5. The method of claim 1, further comprising depositing particles of the first electroactive material on the first terminal. 6. The method of claim 1, wherein the electrical field attracts particles of the first electroactive material to the first terminal and repels particles of the first electro active material from the second electroactive material in the medium. 7. The method of claim 1, wherein the electrical field repels particles of the first electroactive material from the second electroactive material in the medium. 8. The method of claim 1, further comprising providing an ionically conductive material in the electronically insulating separation between the first and second electroactive materials. 9. The method of claim 8, wherein the ionically conductive material is a liquid electrolyte. 10. The method of claim 1, wherein the medium includes a polymer, and wherein preserving the electronically insulating separation between the first and second electroactive materials includes solidifying or drying the polymer to form a solid polymer electrolyte. 11. The method of claim 1, wherein the second electro active material has a three-dimensional structure defining a void space, and wherein the field causes particles of the first electroactive material to concentrate in the void space. 12. The method of claim 11, wherein the second electroactive material is a porous electrode, and wherein the field causes particles of the first electroactive material to concentrate in the pore space of the porous electrode. 13. The method of claim 12, wherein the porous electrode is a reticulated open-cell carbon, metal or ceramic foam. 14. The method of claim 1, the second electroactive material comprising particles wherein particles of at least one of the first and second electroactive materials are coated with a conductive material. 15. The method of claim 1, wherein at least one of the terminals is patterned to include a serpentine, spiral, or comb-like region and further comprising depositing at least a portion of the first or second electro active material in the region. 16. The method of claim 1, wherein the first and second terminals are constructed and arranged to be interdigitated. 17. The method of claim 1, the second electroactive material comprising particles, wherein causing particles of the first electroactive material to forming an electronically continuous first electrode comprises depositing particles of the first electroactive material, and wherein the method further comprises generating a second field causing particles of the second electroactive material to deposit on the second terminal, thereby forming an electronically continuous second electrode. 18. The method of claim 17, wherein the act of generating an electric field while creating an electronically insulating separation between the first and second electroactive materials further comprises creating an electronically insulating separation between the first and second electrodes; and wherein the act of preserving the electronically insulating separation between the first and second electroactive materials comprises preserving the electronically insulating separation between the first and second electrodes. 19. The method of claim 17, wherein the first and second electrodes are formed simultaneously. 20. The method of claim 17, wherein the first and second electrodes are formed sequentially.

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