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All-Solid-State-Batteries are Still in Development Phase So far, only some China OEMs have publicly released their SOP plans for solid state batteries. Three of them choose sulfide electrolyte in their technology stack due to the technology’s ionic conductivity and manufacture feasibility. By now, sulfide-based battery have become the mainstream route worldwide, Japan, South Korea, Europe, the United States and China have increased their R&D investment in sulfides.
OEM
Solid State Battery Technology
SOP Plan
High Nickel cathode + Si/C anode + Polymer electrolyte
High Nickel cathode + Si/C anode + Sulfide/Halide electrolyte
High Nickel cathode + Si/C anode + Sulfide/Polymer electrolyte
High Nickel cathode + Si/C anode + Halide electrolyte
High Nickel cathode + Si/C anode + Sulfide electrolyte
Source: 2025第二届中国全固态电池创新发展高峰论坛
Reason 1: High ionic conductivity
Ionic conductivity: 32 mS/cm Ion transfer number: ~1
Reason 2: Easy to manufacture
A continuous ion pathway can be formed in the composite electrode by cold pressing
A compact electrolyte film can be formed by cold pressing
Extracted from the PDF; charts and images may read imperfectly.
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