Method of preparation of cupric sulfide electrodes

Abstract

Abstract An improved method of preparing cupric sulfide electrodes for electrochemical cells wherein the electrodes are made by preparing a first mixture comprising the total stoichiometric amount of copper required and about 25 to 35 percent by weight of the required stoichiometric amount of sulfur and heating this first mixture in a pre-sulfuration step to a temperature of between 120* and 160* C., then preparing a second mixture by adding to the product of the presulfuration step the complemental balance of the stoichiometric amount of required sulfur relative to the whole amount of copper or a slightly larger amount, compressing the second mixture in a mold under a pressure of from 0.25 to 2 t/cm2 and heating the second mixture in a sulfuration step for about 15 hours to a temperature between 120* and 160* C., thereafter demolding and cooling the mold contents and then heating the cooled content now in form of an electrode again to a temperature of from 120* to 160* C. for about 10-15 hours to provide the cupric sulfide electrode. The process avoids limitations of amounts of cupric sulfide that may be formed while avoiding ignition of the sulfur during sulfuration of the copper which ignition danger currently limits production to 20 gram batches. Electrodes and electrochemical cells with such electrodes are also described.

Inventors

• 👤 Gerard Marcel Gerbier
• 👤 Victor Louis Dechenaux

Bibliographic Details