+86 13332949210
info@xihobattery.com
Xiho
Apr 14 2025Solid-State Battery Tech Routes: Oxides, Sulfides & Polymers Compared
At present, the main technical routes of solid-state batteries in the world can be divided into three categories: oxides, sulfides, and polymers. Each technical route has different performance advantages and challenges.
1.Oxide solid-state batteries
Oxide solid-state batteries’ excellent thermal stability (above 600°C), suitable for high-voltage positive electrode materials (such as high-nickel ternary), low manufacturing cost; but poor interface contact leads to short cycle life (laboratory life ≤ 500 times), low room temperature conductivity (about 10⁻⁴ S/cm), and liquid electrolyte or polymer needs to be added to improve performance.
2.Sulfide solid-state batteries
Sulfide solid-state batteries have highest ionic conductivity (up to 10⁻³ S/cm at room temperature), high energy density potential (theoretical 500Wh/kg), suitable for all-solid-state systems; but poor chemical stability (easy to oxidize to produce hydrogen sulfide), high preparation cost (sulfide material cost is 5-10 times that of lithium carbonate), and requires oxygen-free environment packaging.
3.Polymer solid-state batteries
Polymer solid-state batteries' good processability (compatible with existing production lines), flexible adaptation to consumer electronics, and controllable costs; however, room temperature conductivity is low (needs to be heated to above 60°C), and the energy density ceiling is obvious (≤300Wh/kg).
