Cd|KOH|NiOOH

Zn|NH4CI|MnO2

Li|LiClO4|MnO2

Pb|H2SO4|PbO2

H2|KOH|O2

Current leads corrosion and the problem of diagnostics of fluorocarbon-lithium cells

Corrosion behavior of niobium current leads of fluorocarbon-lithium cells are studied. Polarization measurements at plain niobium leads and at such leads in a contact with fluorocarbon cathode in an electrolyte of fluorocarbon-lithium cell were carried out. Besides, behavior of niobium lead directly in a feedthrough of real cells was studied. The contact of niobium with fluorocarbon cathode is shown to result in toughening of corrosion conditions and in possible niobium depassivation. Long-term cells storage at elevated temperature was shown to result in complete corrosion dissolution of niobium leads. Certain correlation between cell's OCV and corrosion intensity was obtained.

Literature

1. Pat. 5306581 US. C03C 8/24 (20060101). Battery with weldable feedthrough.
2. Pat. 5811206 US. H01M 2/06 (20060101). Feedthrough pin insulator, assembly and method for electrochemical cell.
3. Пат. 33 000 И1 РФ. МПК7 A61F 2/70 Источник тока для имплантируемых медицинских приборов.
4. Фатеев С. А., Рынсков Е.В, Ясюкевич Д. О. // Вестн. РАЕН. 2007. Т. 7, № 3. С. 33–36.