FABRICATION OF ULTRATHIN SOLID ELECTROLYTE BATTERIES.
Abstract
Further experiments were conducted with thin-film silver iodide, silver bromide, and KAg4I5 electrolyte cells. Problems of current leakage were eliminated by using quartz substrates. Silver iodide electrolyte cells were prepared in a nonoverlapping format on quartz. Cells charged to 0.485 V exhibited excellent voltage stability and shelf life of over two months. It was possible to fabricate Pt/AgI/Ag cells approx. 5 microns thick in an overlapping format, and by maintaining the voltage of the cell in vacuum during fabrication, we ensured considerable reproducibility of the fabrication method. Nonoverlapping symmetrical Ag/AgI/Ag cells exhibit strain gauge characteristics and may be used as stress-sensing devices. Silver bromide electrolyte cells have shelf life, and overlapping Au/AgBr/Ag cells 8-10 microns thick were prepared and tested successfully. A mixed salt electrolyte (KAg4I5) was prepared and successfully evaporated, and the charge-discharge characteristics of Pt/KAg4I5/Ag nonoverlapping cells were studied. Thin-film cells exhibited an increase in dc internal resistance with aging which may have been caused by the formation of a Pt or Au halide layer, voids in the Ag electrode-electrolyte interface, or actual degradation of the electrolytes. Evaporated silver films showed a tendency to disappear from silver halide electrolyte surfaces possibly because of neutral iodine present in the evaporated electrolyte. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1967
- Accession Number
- AD0824398
Entities
People
- J. Clune
- J. I. Masters
- P. Vouros