Accession Number : AD0671050

Title :   CRYSTALLOGRAPHIC CHANGES DURING OXIDATION (CHARGING) OF THE SILVER ELECTRODE. PART I. INITIAL OXIDATION OF AN INDUSTRIAL SINTERED PLAQUE.

Descriptive Note : Interim rept.,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s) : Wales,C. P. ; Simon,A. C.

Report Date : 03 MAY 1968

Pagination or Media Count : 28

Abstract : The Ag electrode was studied during oxidation using the optical microscope. As a preliminary to other, more detailed experiments, the oxidation during the first charge of an unused sintered Ag plaque was observed as Ag was converted first to Ag2O and then to AgO. The initial oxidation occurred on the smaller particles of Ag, and these were usually completely oxidized by the end of charge, whereas the larger Ag particles were left largely unconverted. The rate of reaction was quite unequal in different areas of the electrode. AgO crystals were larger than Ag2O crystals and may have blocked the surface in some areas. Both particle size of Ag and the formation of dense layers of AgO may have limited complete oxidation and may partially have been responsible for the inability of the electrode to produce the full capacity that was theoretically possible. (Author)

Descriptors :   (*ALKALINE BATTERIES, ELECTRODES), (*ELECTRODES, SILVER), (*SILVER, OXIDATION), OXIDES, CRYSTALLOGRAPHY, SILVER COMPOUNDS, CRYSTAL STRUCTURE, PARTICLE SIZE, MICROSCOPY

Subject Categories : Physical Chemistry
      Electrochemical Energy Storage
      Crystallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE