An Indicator for the Detection of Sulphur Dioxide from Cells and Batteries.

摘要

This report presents the results of the experimentation for the development of a chemical indicator for use in the detection of sulfur dioxide. This indicator has application for use with lithium-sulfur dioxide cells/batteries and with cells and batteries in which thionyl chloride or sulfuryl chloride is used as the active cathode. A depletion or sulfur dioxide from a lithium-sulfur dioxide cell of battery with subsequent use may produce unsafe conditions for the user. Both thionyl and sulfuryl chloride undergo hydrolysis in ambient humidity and produce amounts of sulfur dioxide. This indicator can be used as a warning device for leakage or venting in these types of cells and batteries and consists of potassium chromate adsorbed onto a silicon powder with subsequent suspension in a silicon rubber material. (Author)