All Solid State Battery (ASSB)

 Due to serious issues worldwide such as depletion of fossil fuels and restrictions on carbon dioxide emission, the development and demand for electric vehicles and energy storage systems (ESS) are increasing along with the production of eco-friendly new and renewable energy.

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 In the case of all-solid-state batteries, the solid electrolyte plays a role in preventing evaporation of the liquid electrolyte due to temperature changes or leakage due to external shocks, thus showing high stability from explosion and fire. In addition, only the solid electrolyte can play the role of the liquid electrolyte and the separator of secondary battery at the same time, and since leakage and explosion-proof parts such as additional temperature control and protection circuits are not required when manufacturing the cell, the weight and volume of the battery are reduced.

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 On the other hand, due to the characteristics of a solid, the ionic conductivity is lower than that of a liquid, and the interface resistance between the positive and negative electrodes is high, so the capacity are lower than that of a secondary battery using a conventional liquid electrolyte. In order to improve these problems, studies on polymer-based, sulfide-based and oxide-based solid electrolytes are actively underway.