Summary
- SK On published research on all-solid-state batteries (ASSBs)
- Research focused on using ultrafast photonic sintering technology for manufacturing oxide-rich solid electrolytes
- Production costs and scalability obstacles exist in oxide-based electrolyte materials
- Research team optimized photonic sintering process to create a hybrid solid electrolyte with long cycle life
- SK On is developing polymer-oxide composite and sulfide-based ASSBs, with commercial prototypes expected by 2027 and 2029 respectively
Article
SK On has conducted research on all-solid-state batteries (ASSBs) in collaboration with Dr. Jin Ho Kim’s group at the Korea Institute of Ceramic Engineering and Technology. The focus was on using ultrafast photonic sintering technology to manufacture oxide-rich inorganic-organic composite hybrid solid electrolytes. By optimizing the sintering process and utilizing inorganic colorants to minimize energy loss, the team was able to create a porous microstructure with uniformity, improving lithium-ion transport pathways and mechanical strength. This approach allowed for the production of a hybrid solid electrolyte that showed promising results in terms of long cycle life for batteries.
In a separate study, SK On investigated the potential of lithium- and manganese-rich layered oxide (LMRO) cathodes for sulfide-based ASSBs in collaboration with Prof. Kyu Tae Lee’s group at Seoul National University. The research, featured in Advanced Energy Materials, focused on understanding the degradation mechanism of LMRO cathodes when used with liquid electrolytes in conventional lithium-ion batteries. The team found that oxygen released during charge/discharge oxidizes the sulfide solid electrolyte, leading to degradation. By applying a special coating material to suppress oxygen release, the cycle life of the LMRO cathodes was enhanced.
SK On’s proactive R&D efforts and technical capabilities have led to significant advancements in the development of next-generation batteries. The company is actively working on the development of polymer-oxide composite and sulfide-based ASSBs, with plans to produce commercial prototypes by 2027 and 2029, respectively. A solid-state battery pilot facility is currently under construction at SK On’s research center in Daejeon, Korea, and is expected to be completed in the second half of 2025.
The collaboration between SK On and research partners has shown promising results in improving the performance and durability of ASSBs. By utilizing innovative technologies such as ultrafast photonic sintering and special coating materials, the team has been able to address key challenges in the production and operation of solid-state batteries. These advancements demonstrate SK On’s commitment to remaining at the forefront of battery technology development and driving leadership in the next-generation battery sector.
SK On’s research efforts have not only focused on enhancing the performance of ASSBs but also on understanding the underlying mechanisms of degradation in battery components such as LMRO cathodes. By gaining a comprehensive understanding of degradation mechanisms, the team has been able to develop solutions to improve the cycle life and overall performance of ASSBs. These insights will be invaluable in the continued development of solid-state batteries and the transition to more sustainable and efficient energy storage solutions.
Overall, SK On’s research in the field of all-solid-state batteries has showcased the company’s dedication to innovation and technology advancement. By collaborating with leading research institutions and utilizing cutting-edge techniques, SK On has made significant strides in improving the performance and durability of solid-state batteries. With plans to introduce commercial prototypes in the coming years and the construction of a dedicated pilot facility, SK On is poised to make a significant impact on the next-generation battery sector and contribute to the advancement of sustainable energy storage solutions.
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