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US3661648A Expired / Lapsed US ⏱️ 0.0 years remaining

Preparation of cuprous chloride electrodes

Assignee: SAFT Societe des Accumulateurs Fixes et de Traction SA
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Filing: 1970-07-31
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Granted: 1972-05-09
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Expires: 1990-07-31
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Abstract

Abstract Electrodes for electrochemical cells are prepared from porous copper-containing carrier bodies by immersion at ambient temperature of such bodies in cupric chloride dissolved in an organic non-aqueous solvent such as methanol and subsequently washed in an organic compound capable of dissolving cupric chloride, e.g. methanol to remove excess cupric chloride and then dried in vacuo. The porous carrier bodies may be prepared by sintering arborescent copper powder selected from the group consisting of acicular form or dendritic form having an apparent density of between 1 and 2 first molded to desired shape then heated to about 700* C. in a reducing atmosphere for about one half hour. A conductive copper or copper plated support of metal gauge or perforated metal sheet may be incorporated in the powder during molding. In the alternative the copper carrier body can be molded from such copper powders agglomerated with an organic binder selected from the group consisting of polystyrene, polyethylene and polytetrafluoroethylene and this molded body immersed in cupric chloride dissolved in organic solvent such as methanol, with subsequent washing in organic compound such as methanol to remove excess cupric chloride and ultimate drying in vacuo. Electrodes and electrochemical cells utilizing said electrodes are also described.

Inventors

  • 👤 Gerard Marcel Gerbier
  • 👤 Victor Louis Dechenaux

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-04 15:18
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/06; H01M4/08

Claims Analysis

Total Claims: 13
Claim 1
Independent Claim 13 words
A method according to claim 1, wherein said organic solvent is an alcohol.
Claim 2
Dependent Claim 11 words
A method according to claim 2, wherein said alcohol is methanol.
Claim 3
Dependent Claim 38 words
A method according to claim 1, wherein said non-aqueous solution comprises cupric chloride and said organic solvent is methanol there being approximately 500 to 600 g per liter of cupric chloride dissolved in each liter of said methanol.
Claim 4
Dependent Claim 30 words
A method according to claim 1, wherein said metal copper containing carrier body is immersed into said non-aqueous solution maintained at ambient temperature for from about 30 to 45 minutes.
Claim 5
Dependent Claim 41 words
A method according to claim 5 wherein subsequent to immersion in said solution, the carrier body is waShed in an organic compound capable of dissolving any cupric chloride existing in excess in the carrier body and said body is subsequently dried.
Claim 6
Dependent Claim 19 words
A method according to claim 6 wherein said organic compound is methanol and the drying is effected in vacuo.
Claim 7
Dependent Claim 35 words
A method according to claim 1, including the step of preparing the porous metallic copper containing carrier body from copper powder in aborescent form by molding and sintering at elevated temperature in a reducing atmosphere.
Claim 8
Dependent Claim 18 words
A method according to claim 8 including incorporation into the molded powder carrier body of a conductive support.
Claim 9
Dependent Claim 36 words
A method according to claim 9, wherein said support is located in a median plane of said carrier body, said conductive support being selected from the group consisting of perforated copper and copper plated perforated steel.
Claim 10
Dependent Claim 33 words
A method according to claim 1 including the step of preparing the metallic copper containing carrier body by mixing copper powder in arborescent form with an agglomerate and molding to carrier body shape.
Claim 11
Dependent Claim 20 words
A method according to claim 11 wherein said agglomerant is selected from the group consisting of polystyrene, polyethylene and polytetrafluoroethylene.
Claim 12
Dependent Claim 20 words
A method according to claim 11 including incorporation of a conductive metallic support into the carrier body during molding thereof.
Claim 13
Dependent Claim 20 words
A method according to claim 13 including location of the said support in a median plane of the carrier body.

References Cited (Backward Citations)

US2744948A Cited
US3415687A Cited
US3531328A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1975-05-09 1975-11-08 1976-05-09 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-05-09 1979-11-08 1980-05-09 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-05-09 1983-11-08 1984-05-09 $7700.00 Window Closed / Lapsed

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