[테크월드뉴스=이재민 기자] The Korea Electronics Research Institute (KETI) Next-Generation Battery Research Center has developed a material technology that reduces the amount of hydrogen sulfide gas generated by sulfide-based solid electrolytes, a core material for all-solid-state batteries that are attracting attention as next-generation batteries.
The key to this material technology is to reduce the generation of hydrogen sulfide by adding and synthesizing a small amount of zeolite nanoparticles to the solid electrolyte.
The sulfide-based solid electrolyte has a disadvantage in that hydrogen sulfide, a harmful gas, is generated due to its high reactivity to moisture, which has acted as an obstacle to deterioration of battery performance and difficulty in handling in the battery manufacturing process.
When the technology developed by KETI is applied, the generation of hydrogen sulfide is reduced to 1/3 even when exposed to the atmosphere (relative humidity of 50%), and the battery life can be secured stably by preventing the deterioration of the electrolyte material. In addition, even if the battery itself is destroyed, it is effective in securing battery safety because it reduces the generation of hydrogen sulfide.
Dr. Wooseok Jo (lead researcher) team who led the technology development said, “Because we used existing materials as an additive concept, we were able to secure efficient technology in a shorter period of time compared to developing new materials. We will spur the development of new electrolyte materials.”
Meanwhile, this research and development performance was recognized for its excellence and was published in the latest issue (July 22) of the ‘Journal of Materials Chemistry A’, an international academic journal in the field of materials chemistry.
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