Accession Number:

AD0912458

Title:

Failure Analysis of Porous Electrodes.

Descriptive Note:

Final rept.,

Corporate Author:

CALIFORNIA UNIV LOS ANGELES SCHOOL OF ENGINEERING AND APPLIED SCIENCE

Report Date:

1973-05-01

Pagination or Media Count:

28.0

Abstract:

A single pore AgAgCl electrode was constructed for the study of elementary processes that occur in porous electrodes. X-ray element scan was applied to determine the average local transfer current densities inside the pore. The morphology of AgCl on the surface of silver was studied using a scanning electron microscope. It was found that the size of AgCl particles depended on the average local current densities and the local electrolyte concentrations. Higher current densities gave smaller AgCl mounds, in general. The formation of AgCl was also observed to form mainly from electrolyte diffusion paths as opposed to solid phase diffusion. A porous structure of silver was observed after cycling. The use of intercalation compounds of graphite as reactants in nonaqueous secondary batteries has been investigated. Experiments were carried out on a cell of the type LiLiClO4, DMSUC,LiF. Two discharge plateaus were observed, one occurring above 4.0 V and another more predominant one between 2.8 and 2.5 V. The lower discharge plateau is characteristic of the discharge plateau of a primary battery using fluorographite as the reactant. The higher discharge plateau is probably dire to the formation of the intercalation compound CnClO4 n1. The lower discharge plateau is comparable to the behavior of the cells described by Watanabe, et al., 1970 and Brauer 1970 using flourographite as the reactant. Author

Subject Categories:

  • Electrochemical Energy Storage
  • Properties of Metals and Alloys

Distribution Statement:

APPROVED FOR PUBLIC RELEASE