Silver electrodes which require no supporting grid and have a porosity graded structure were fabricated by combining silver powder of uniform mesh size with a plasticizer and pore forming additives. The proportions of these materials are selected to give a uniform doughlike mixture which is rolled and then sintered. Porosity control is achieved by controlled decomposition of the plasticizer and pore forming additives. Multilayered graded porosity electrodes are assembled by a combination of sintering and compaction. Performance data based on cycling tests and coulombic efficiencies demonstrated that these electrodes are comparable to conventional silver electrodes and the absence of the grid is not a limiting factor.
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