system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How does a solid state battery work? How do electrolytes move through a solid transfer medium?
gpt
The common lithium-ion batteries we use today are made up of mostly liquid, with lithium-ions used as the electrolyte. 

Electrolytes are basically electrically conductive substances. 

To create a solid state drive, a highly conductive glass formed from lithium hydroxide and lithium chloride and doped with barium, creating a solid form of the liquid lithium-ion battery. The glass here serves as a kind of “substitute” for the liquid in the lithium-ion cell. 

This allows for fast charging of the battery without the formation of metal dendrites (one of the reasons lithium-ion batteries are unstable and occasionally explode).