Electronics > Beginners

Do Lithium cells use electrolyte?

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Cliff Matthews:
Maybe what's mentioned as electrolyte here (at about 9:30) is some kind of a catalyst, and after spraying it in, all other operations must be done in a vacuum? The rest is quite entertaining but not too technical for non-chemistry folks like me. - Enjoy

andy3055:
Here is a nice explanation: https://www.energy.gov/eere/articles/how-does-lithium-ion-battery-work

I think one can say that the basic principle is like most rechargeable batteries. Only that there are different elements in the construction. I just saw a nice tear down video from Dave just yesterday.

David Hess:
The electrolyte has to be an organic solvent and not water because water will electrolyze at the operating voltage of the cell.  Typically the organic solvent is flammable.

Cliff Matthews:

--- Quote from: David Hess on January 06, 2020, 07:51:02 pm ---The electrolyte has to be an organic solvent and not water because water will electrolyze at the operating voltage of the cell.  Typically the organic solvent is flammable.

--- End quote ---
Since it's sealed, punctures provide both oxygen and if charged, current enough to ignite the solvent. Funny, when the word electrolyte is mentioned I would always associate it with hygrometers for testing auto batteries..  :)

David Hess:
I have a word of warning.  If you rip a lithium polymer cell apart, the ones in the foil packages, then do *not* get the liquid electrolyte on your skin.  I have had strong acid and strong base burns which were not as annoying.

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