Sealed Lithium Inorganic Electrolyte Cell
Quarterly rept. no. 5, 1 Mar-31 May 1975
GTE LABS INC WALTHAM MA
Pagination or Media Count:
Electrolyte studies were continued using the standard size D cell as a test vehicle in an effort to establish the influence of various impurities on the passivation of lithium anodes. Impurities usually found in raw thionyl chloride, such as Cl2 and SO2, have been purposely added to the electrolyte to enhance any effect they might have on the lithium passivation. A rapid loss in the cell capacity in Cl2 containing electrolyte has been observed as a result of lithium corrosion. The cells showed the usual passivation in this electrolyte following the exhaustion of the chlorine in the corrosion reaction. An excess AlCl3 has been added to the electrolyte, knowing that it would attack the lithium surface and prevent the passivation for as long as there is an excess of AlCl3 in the electrolyte. The corrosion reaction proved to be too fast and the cell behavior appeared to be similar to that observed with an excess of Cl2. Iron impurities usually come to the electrolyte with AlCl3. A substantial increase in the cell voltage delay has been observed in the presence of iron added to the electrolyte in the form of FeCl3.
- Electrochemical Energy Storage