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Specialty Chemistry Forums => Citizen Chemist => Topic started by: AdiDex on April 14, 2016, 10:09:54 PM

Title: Silver in Lead-acid Batteries ??
Post by: AdiDex on April 14, 2016, 10:09:54 PM

Yesterday I've received a message from my friend , He asked me During the recycling of Lead-Acid battery do we get silver ?? If we get silver then what is the method for extracting it ??

This sounds silly to me . I've read Lead-Acid batteries in High School but I've never read about Silver is present in them . I've already searched on Wikipedia page of lead-acid battery , there is no "Silver" present , even i have a RSC's book , "Understanding Batteries" I didn't get there too . 

So Now I am thinking that there is no silver in Lead-Acid Batteries . Am I going on right way ??

Title: Re: Silver in Lead-acid Batteries ??
Post by: AdiDex on April 14, 2016, 10:37:36 PM

I didn't checked well , Now I got something . There is so called Silver Calcium battery . They are used now days . I've got some products name Exide and Amaron Batteries ,They use silver to provide better resistance for Heat corrosion . Increase their Durability .
This what I got in Advertisements and on Wiki .
https://en.wikipedia.org/wiki/Silver_calcium_battery (https://en.wikipedia.org/wiki/Silver_calcium_battery) 
http://www.yuasa.co.uk/info/technical/silver-calcium-batteries/ (http://www.yuasa.co.uk/info/technical/silver-calcium-batteries/)
http://www.exide.com/Media/files/Downloads/TransAmer/Transportation%20Americas%20Brochures%20for%20Download/Exide%20Automotive%20Family%20Consumer%20Brochure.pdf (http://www.exide.com/Media/files/Downloads/TransAmer/Transportation%20Americas%20Brochures%20for%20Download/Exide%20Automotive%20Family%20Consumer%20Brochure.pdf)

So finally I got answer to the first question . But How to extract it during the recycling process ??  We have a Lead-Calcium-Silver Alloy ..!! Now this question belongs to Metallurgy Which I've never took seriously .  ;D

Title: Re: Silver in Lead-acid Batteries ??
Post by: AdiDex on April 15, 2016, 10:43:47 PM

any helper ??

Title: Re: Silver in Lead-acid Batteries ??
Post by: Borek on April 16, 2016, 07:37:26 AM

Dissolve the electrodes, look for a reducing agent that will reduce Ag⁺ only (or deposit Ag electrochemically).

Note amount of silver (which I found listed as up to 0.015% here: http://www.google.ch/patents/US20050112470) is so low process won't be economically viable.

I am not even sure your friend think about lead-silver or lead-silver-calcium batteries.