[특허]Battery electrode and method of making

Battery electrode and method of making 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B29D-027/00 H01M-004/58 H01M-004/62
출원번호	US-0556826 (1983-12-01)
발명자 / 주소	Shia, George A.
출원인 / 주소	Allied Corporation
대리인 / 주소	Plantamura, Arthur J.Friedenson, Jay P.Stewart, Richard C.
인용정보	피인용 횟수 : 49 인용 특허 : 18

초록 ▼

An improvement is provided for the manufacture of perhalogenated polymer, e.g., PTFE, bonded electrodes. The formulation comprises a mixture of an active material is carbon monofluoride (otherwise known as fluorinated graphite or fluorinated carbon or CF x or (C 2 F) n ); a conductive carbon additive, such as acetylene black or graphite; and polytetrafluoroethylene (PTFE). The process comprises high shear mixing to cause the PTFE to fibrillate. The mixture is then wet with a non-polymeric pore-former to make the mixture more pliable and to create micropores in the electrode when the solution is removed by evaporation. The wet mixture is then sequentially suitably formed into a, e.g., extruded, or calendered or pressed to flatten the mixture to a thin sheet and rolled up and folded and pressed out again until a uniform sheet is obtained and the like. The resulting product affords a sheet which is relatively flexible, and stronger and allows a lower PTFE loading than has been obtained with other electrode sheet materials formed with fibrillatable polymers. The higher the PTFE content, the higher the voltage losses for the electrode.

대표청구항 ▼

1. A method of producing a porous conductive battery electrode comprising blending an electrode-active solid material with from about 0.5 to about 10 percent by weight of a fibrillatable fluoropolymer and with from about 30 to about 60 percent by weight of a wetting, volatile, substantially non-polymeric, pore-forming liquid, subjecting the blend to a shearing process until the blend in converted into a self-sustaining cohesive mass in which the electrode-active material is wholly bound by the fibrillated fluoropolymer; and is intimately wetted by said non-polymeric liquid, forming said blend into the desired shaped electrode, and imparting porosity to said electrode without disrupting said formed shape by volatilizing said non-polymeric liquid from the shaped electrode. 2. The method of claim 1 wherein the extraction of said volatile pore forming liquid is effected during the formulation of said composition into the desired shaped electrode. 3. The method of claim 1 wherein from about 1 percent to about 25 percent by weight of electrical conductivity enhancing particulate material is added to said active material. 4. The method of claim 3 wherein the electrical conductivity enhancing material is acetylene black. 5. The method of claim 1 wherein the electrode active material is carbon monofluoride. 6. The method of claim 1 wherein the fluoropolymer is PTFE. 7. The method of claim 1 wherein the fluorinated polymer is present in amounts of from 0.5 percent to 4 percent by weight of the total composition. 8. The method of claim 4 wherein the fluoropolymer is PTFE. 9. The method of claim 8 wherein the electrode-active material is carbon monofluoride. 10. A product made by the method of claim 1. 11. A product made by the method of claim 9.

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

내보내기 구분	파일저장 인쇄 메일전송
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연합인증

Battery electrode and method of making 원문보기

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Battery electrode and method of making 원문보기

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이 특허를 인용한 특허 (49)

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