The liquid electrolyte gets substituted by a solid electrolyte which is why these batteries are referred as solid state batteries. Many people get confused that solid state batteries are totally different type of batteries than the existing lithium ion batteries.
Solid-state batteries theoretically offer much higher energy density than the typical lithium-ion or lithium polymer batteries. While solid electrolytes were first discovered in the 19th century, several problems prevented widespread application.
You can’t really make solid state batteries as a cylindrical cell as they are not flexible enough to wind into a cylindrical format. So current lithium-ion battery production lines would have to adapt to pouch-type cells.
Pranav: Yes the cathode will be the same. There’s a lot of confusion that solid state batteries don’t contain cobalt, manganese and nickel, but it’s not necessarily true. There is a possibility of using different cathodes but the current ones will still be in use even with solid state batteries.
As a result, solid-state batteries will last longer than conventional batteries and can be charged more quickly. Solid-state battery technology has a smaller carbon footprint than lithium-ion technology because of all this lightweight material and safety, which means our environment is better protected.
Solid-state batteries can use metallic lithium for the anode and oxides or sulfides for the cathode, increasing energy density. The solid electrolyte acts as an ideal separator that allows only lithium ions to pass through.