Quick Takeaways
- SK On silicon anode solid-state battery shows stable performance with new PPMA binder material.
- The development strengthens SK On’s roadmap toward commercial solid-state batteries for EVs.
SK On has announced the development of a new binder material, PPMA, for its SK On silicon anode solid-state battery, created in collaboration with Yonsei University. The company stated that PPMA combines electrical conductivity with strong adhesion, directly addressing long-standing structural stability challenges in silicon anode solid-state batteries.
The newly developed PPMA binder is designed to support silicon anodes that typically suffer from mechanical stress and degradation during repeated charging and discharging. By enhancing electrode integrity, the material helps maintain consistent electrochemical performance while improving overall battery durability under demanding operating conditions.
SK On silicon anode solid-state battery validated under low pressure
SK On confirmed stable operation of the SK On silicon anode solid-state battery using PPMA even under low-pressure conditions. This result is significant because it demonstrates practical commercial applicability, where reducing pressure requirements can simplify battery pack design and lower manufacturing complexity for electric vehicle applications.
Performance evaluations were conducted using high-energy-density pouch-type batteries developed to reflect real-world EV use cases. According to the company, these tests showed no observable capacity decline even after hundreds of charge and discharge cycles, with the batteries retaining their initial performance characteristics throughout the evaluation period.
Solid-state battery mass production roadmap at SK On
In parallel with material development, SK On is accelerating preparations for large-scale solid-state battery production. In the latter half of 2025, the company built a pilot plant for all-solid-state batteries at its Daejeon Future Technology Research Center in South Korea, marking a critical step toward manufacturing readiness.
Looking ahead, SK On aims to commercialize solid-state batteries by 2029. To achieve this goal, the company plans to further advance core technologies through continued industry–academia collaboration with leading universities in South Korea and overseas, reinforcing its position in next-generation battery innovation.
The newly developed PPMA binder is designed to support silicon anodes that typically suffer from mechanical stress and degradation during repeated charging and discharging. By enhancing electrode integrity, the material helps maintain consistent electrochemical performance while improving overall battery durability under demanding operating conditions.
SK On silicon anode solid-state battery validated under low pressure
SK On confirmed stable operation of the SK On silicon anode solid-state battery using PPMA even under low-pressure conditions. This result is significant because it demonstrates practical commercial applicability, where reducing pressure requirements can simplify battery pack design and lower manufacturing complexity for electric vehicle applications.
Performance evaluations were conducted using high-energy-density pouch-type batteries developed to reflect real-world EV use cases. According to the company, these tests showed no observable capacity decline even after hundreds of charge and discharge cycles, with the batteries retaining their initial performance characteristics throughout the evaluation period.
Solid-state battery mass production roadmap at SK On
In parallel with material development, SK On is accelerating preparations for large-scale solid-state battery production. In the latter half of 2025, the company built a pilot plant for all-solid-state batteries at its Daejeon Future Technology Research Center in South Korea, marking a critical step toward manufacturing readiness.
Looking ahead, SK On aims to commercialize solid-state batteries by 2029. To achieve this goal, the company plans to further advance core technologies through continued industry–academia collaboration with leading universities in South Korea and overseas, reinforcing its position in next-generation battery innovation.
Company Press Release
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