[특허]Lightweight fuel cell membrane electrode assembly with integral reactant flow passages

Lightweight fuel cell membrane electrode assembly with integral reactant flow passages 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H01M-008/04
출원번호	US-0759463 (1991-09-13)
발명자 / 주소	Wilkinson David P. (North Vancouver CAX) Voss Henry H. (North Vancouver CAX) Prater Keith B. (Vancouver CAX)
출원인 / 주소	Ballard Power Systems Inc. (North Vancouver CAX 03)
인용정보	피인용 횟수 : 109 인용 특허 : 0

초록 ▼

An electrochemical fuel cell is provided for converting a fuel reactant stream and an oxidant reactant stream to a reaction product stream and electrical energy. The fuel cell includes a membrane electrode assembly interposed between two separator layers. The separator layers are formed of thin electrically conductive sheet material which is substantially impermeable to the fuel and oxidant reactant streams. The membrane electrode assembly comprises first and second electrode layers formed of porous electrically conductive sheet material. The electrode layers have a catalyst associated therewith, and an ion exchange membrane is interposed between the first and second electrode layers. The electrode layers include passages, such as the interstitial spaces within the electrode material or grooves formed in the surface of the electrode material, for flowing a reactant stream between an inlet and outlet within the electrode layer. The incorporation of the reactant flow passages within the electrode material permits the use of thin, lightweight separator layers, thus providing higher power-to-volume and power-to-weight ratios than conventional fuel cells having reactant flow passages engraved, milled or molded in the separator plates.

대표청구항 ▼

An electrochemical fuel cell for converting a fuel reactant stream and an oxidant reactant stream to a reaction product stream and electrical energy, said fuel cell comprising: first and second separator layers, said separator layers formed of electrically conductive sheet material, said sheet material substantially impermeable to said fuel and oxidant reactant streams; a membrane electrode assembly interposed between said first and second separator layers, said assembly comprising first and second electrode layers, said electrode layers formed of porous electrically conductive sheet material and having a catalyst associated therewith, and an ion exchange membrane interposed between said first and second electrode layers, said first electrode layer comprising a fuel stream inlet, a fuel stream outlet, and means for flowing said fuel stream within the sheet material of said first electrode layer between said fuel stream inlet and said fuel stream outlet; said second electrode layer comprising an oxidant stream inlet, an oxidant stream outlet, and means for flowing said oxidant stream within the sheet material of said second electrode layer between said oxidant stream inlet and said oxidant stream outlet.

이 특허를 인용한 특허 (109)

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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

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Lightweight fuel cell membrane electrode assembly with integral reactant flow passages 원문보기

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Lightweight fuel cell membrane electrode assembly with integral reactant flow passages 원문보기

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