Apparatus and method for fabricating cathode collectors for lithium/oxyhalide electrochemical cells

A technology of current collectors and mixtures, applied in the field of electrochemical batteries, can solve problems such as not being able to be used as active cathode materials

Inactive Publication Date: 2007-07-25
WILSON GREATBATCH LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

An active co-solvent material is electrochemically active and therefore, acts as an active cathode material wher

Method used

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  • Apparatus and method for fabricating cathode collectors for lithium/oxyhalide electrochemical cells
  • Apparatus and method for fabricating cathode collectors for lithium/oxyhalide electrochemical cells
  • Apparatus and method for fabricating cathode collectors for lithium/oxyhalide electrochemical cells

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Embodiment Construction

[0019] The present apparatus is particularly useful in the manufacture of cathode current collector structures such as pressed carbonaceous powder current collectors for lithium / oxyhalide electrochemical cells. More specifically, however, the present device can be used to fabricate "electrode" structures for primary and secondary chemical batteries. The structure of a galvanic cell includes a positive electrode with a liquid catholyte system of conductive or electroactive material supported on a current collector substrate or a solid cathode active material supported on a current collector.

[0020] Regardless of the configuration of the cell, such cells preferably comprise an anode active material of a metal selected from Group IA, IIA or IIIB elements of the Periodic Table of the Elements, including the alkali metals lithium, sodium, potassium, etc., and alloys and intermetallic compounds thereof, such as Li-Mg, Li-Si, Li-Al, Li-B, Li-Al-Mg and Li-Si-B alloys and intermetall...

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Abstract

An apparatus and method for fabricating continuous cathode collecters for use in lithium/thionyl chloride and lithium/sulfuryl chloride cells is described. The preferred electrically conductive material is acetylene black mixed with a polytetrafluroethylene (PTFE) binder in a dry, powderized form. The collector substrate is a nickel or stainless steel foil that has been expanded into a mesh or otherwise provided with perforations. A centering adjustment of the collector substrate controls loading of the electrically conductive mixture onto each side thereof. The dry, powdered electrically conductive mixture is then continuosly fed into the calender and formed into a collector structure by locking to itself through the collector substrate perforations before being cut to size.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to provisional application number 60 / 752,867, filed December 22, 2005. technical field [0003] The present application relates generally to the field of electrochemical cells, and more specifically, to lithium-containing cells with conductive counter-collectors fabricated by a novel continuous feed device. In general, it is disclosed that, for example, a conductive material having a carbonaceous chemistry can be easily pressed onto opposite major faces of a punched conductive current collector substrate without delamination or delamination. This makes the resulting carbon-containing laminates particularly suitable for use as cathode current collectors in lithium / oxyhalide cells. Background technique [0004] Lithium oxyhalide batteries are widely used in applications requiring high gravimetric and volumetric energy densities. Among the many sizes and chemistries available, cells can ...

Claims

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Application Information

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IPC IPC(8): H01M4/04H01M4/62H01M4/08H01M4/64H01M4/139H01M4/485H01M4/58H01M4/583H01M4/587H01M10/052H01M10/0525H01M10/0563H01M10/36
CPCH01M4/587H01M4/139H01M10/0563B29K2995/0005H01M10/052B22F3/18H01M4/5815H01M4/661B29C43/24H01M4/0404H01M4/624H01M4/485H01M4/54Y10T29/49115H01M2300/0031Y10T29/53135Y02E60/122H01M10/0525H01M4/0409H01M4/623B22F7/04H01M6/164H01M4/583H01M4/745H01M4/0435B29K2027/18H01M6/16H01M4/742B29C43/28B22F3/003Y02E60/10Y02P70/50
Inventor P·波尔森尼蒂M·埃尔布M·阿兹孜R·耶特马纳D·伍德诺斯
Owner WILSON GREATBATCH LTD
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