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Cathode and a method of forming a cathode

a cathode and cathode technology, applied in the field of cathodes, can solve the problems of cobalt metal sheet which has a tendency to prematurely separate from the cathode, difficult to remove cobalt metal, and increased difficulty in electrodeposition of cobalt metal

Inactive Publication Date: 2011-09-29
STEELMORE HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0008]It is an object of the invention to overcome or at least alleviate one or mor

Problems solved by technology

The electro deposition of cobalt metal presents additional difficulties, as cobalt metal electro deposits contain inherently high internal stresses.
The electro deposition of cobalt onto standard flat stainless steel blanks, edged by non-conductive edge strips, results in a sheet of cobalt metal which has a tendency to prematurely separate from the cathode.
However, the cobalt metal is much more difficult to remove from the cathode and attempts to remove it may easily result in damage to the cathode.
Damage to the cathodes may require each cathode be repaired on a frequent basis, which leads to higher plant operating costs.
One problem with this cathode is that the masking film is exposed to a harsh environment both in the electrolytic solution and in the stripping procedures.
The masking film easily becomes cracked and damaged, particularly at the edge of the conductive portions.
Breakdown of the masking film leads to metal deposits forming on the damaged areas, which in turn leads to further damage of the masking film.

Method used

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Embodiment Construction

[0034]With reference to FIG. 1, there is shown a face view of a cathode 100 according to an embodiment of the invention. The cathode 100 comprises a planar conductive sheet 105 and raised portions 110. Suitably, the planar conductive sheet 105 is formed of metal. The raised portions 110 are disposed on at least one surface of the planar conductive sheet 105 and are integrally formed with the planar conductive sheet 105. The raised portions 110 formed on a surface of the planar conductive sheet 105 together form an array. Preferably, the raised portions 110 form a front surface array 111 on a front surface of the planar conductive sheet 105 and a rear surface array 112 on a rear surface of the planar conductive sheet 105. The distance between each raised portion 110 is sufficient such that during a usual electro deposition cycle the electro deposited metal on each raised portion 110 does not contact electro deposited metal on a neighboring raised portion 110.

[0035]The size and shape ...

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Abstract

A cathode for receiving electro deposition of metal, the cathode comprising a planar conductive sheet and raised portions disposed on at least one surface of the planar conductive sheet, wherein the planar conductive sheet and the raised portions are integrally formed.

Description

FIELD OF THE INVENTION[0001]The invention relates to a cathode for use in the electrolysis of metal ions and a method of forming said cathode. In particular, although not exclusively, the invention relates to a cathode that is particularly useful for the electrolysis of cobalt ions or nickel ions from a solution.BACKGROUND TO THE INVENTION[0002]The electrolysis of metal ions contained in a solution to give a solid metal product is a well known technique for isolating relatively pure metals. A solid cathode is placed into a metal ion solution and an electric current is applied to the cathode. Electro deposition of the metal onto the cathode then occurs. Periodically, the cathode and the attached metal product are removed from the solution. The solid metal product is then stripped from the cathode and, ideally, the cathode is then reused. The material for a cathode is suitably conductive to allow the metal product to deposit. Additionally, the cathode material allows easy removal of t...

Claims

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Application Information

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IPC IPC(8): C25B11/02C23F1/02
CPCC25C7/02
Inventor CEREZO, JASON ROBERT
Owner STEELMORE HLDG