Silver sulfide conductivity.

Hello.

I´ve been trying to find information on Ag2S conductivity but haven´t
succeeded so far. I am developing a battery pack. There will be minimum
or no sliding at all when making contact thus the self cleaning effect
must be negligible. I have considered to use either silver a gold flash
over silver on the contacts but we fear gold will eventually vanish and
the sulfide could compromise electrical contact.

Any comments or insights will be very much appreciated.

Thank you very much in advance.

Elder.