Dr. Ho-Il Ji from KIST and Professor Sihyuk Choi's team from Kumoh National Institute of Technology have developed a new synthesis method to lower the sintering temperature required for the densification process of the electrolyte in proton ceramic cells. Proton ceramic cells (PCCs) have emerged as next-generation energy conversion devices, utilizing proton transport for enhanced efficiency. The research team's innovative approach involves synthesizing a powder containing two different compounds through low-temperature synthesis, forming a single compound with excellent sintering properties during the process. This advancement allows for sintering at 1,400°C without additives, resulting in a dense membrane electrolyte with superior proton conductance and a power density of 950mW/cm² at 600°C. The team plans to apply this method to the commercialization of large-area proton ceramic cells. Dr. Ji highlighted that this research overcomes sintering challenges in PCC production, offering potential for efficient energy management through green hydrogen production and pink hydrogen production utilizing waste heat from nuclear power plants. The project was supported by the Ministry of Science and ICT and the Ministry of Trade, Industry, and Energy in Korea.