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US 4,051,006 AGranted
Portable electrochemical cell structure
AssigneeBeckman Instruments, Inc.
InventorsRadhakrishna Murty Neti, Ray Lawrence Roggenkamp
Life of this patent
Estimating the term…
Abstract
An electrochemical detection cell particularly suited for portable applications because of its small size and low cost. An enclosure is provided having two membrane surfaces. Electrodes are suspended internally between the two membranes supported by an electrochemically inert hydrophilic material containing an electrolyte solution. An improved electrode structure for use within the cell is disclosed.
Claims6
An electrochemical cell comprising:
- a. a body having a space therein and two openings into said space, said body being of an electrochemically inert material;
- b. a first membrane disposed to cover one of said two openings in said body, said first membrane being of a highly porous electrochemically inert material;
- c. a second membrane disposed to cover the other of said two openings in said body, said second membrane being of highly porous electrochemically inert material;
- d. a first electrode disposed within said space in said body closely adjacent and in non-contacting relationship with said first membrane, said first electrode having a non-sintered layer of platinum black and polytetrafluoroethylene disposed thereon;
- e. a second electrode disposed within said space in said body in non-contacting relationship with said first electrode;
- f. an electrochemically inert hydrophilic filler material disposed within said space in said body and in contact with said first and second electrodes;
- g. an electrolytic material disposed throughout a portion of said filler material and being in contact with said first and second electrodes whereby an electrical path between said first and second electrodes is established through said electrolytic material;
- h. means adapted for providing an electrical connection operably connected to said first and second electrodes;
- and,
- i. means disposed adjacent said first membrane for causing an electrochemical reaction producing fluid to permeate said first membrane and contact said first electrode.
7 more elements
An electrochemical cell comprising:
- a. a body having a space therein and two openings into said space, said body being of an electrochemically inert material;
- b. a first membrane disposed to cover one of said two openings in said body, said first membrane being of a highly porous electrochemically inert material;
- c. a second membrane disposed to cover the other of said two openings in said body, said second membrane being of highly porous electrochemically inert material;
- d. a first electrode disposed witin said space in said body closely adjacent and in non-circulating relationship with said first membrane;
- e. a second electrode disposed within said space in said body in non-contacting relationship with said first electrode;
- f. an electrochemically inert hydrophilic filler material disposed within said space in said body and in contact with said first and second electrodes;
- g. an electrolytic material disposed throughout a portion of said filler material and being in contact with said first and second electrodes whereby an electrical path between said first and second electrodes is established through said electrolytic material;
- h. means adapted for providing an electrical connection operably connected to said first and second electrodes;
- i. means disposed adjacent said first membrane for causing an electrochemical reaction producing fluid to permeate said first membrane and contact said first electrode;
- and,
- j. means disposed adjacent said first membrane for scrubbing the electrochemical reaction producing fluid of undesired components, said means for scrubbing being a permeable layer of silver oxide.
8 more elements
Dependencies are inferred from the claim text.