The global demand for raw lithium materials is rapidly increasing, accompanied by the demand for lithiumion batteries for next-generation mobility. The batch-type method, which selectively separates and concentrates lithium from seawater rich in reserves, could be an alternative to mining, which is limited owing to low extraction rates. Therefore, research on selectively separating and concentrating lithium using an electrodialysis technique, which is reported to have a recovery rate 100 times faster than the conventional methods, is actively being conducted. In this study, a lithium ion selective membrane is prepared using lithium lanthanum titanate, an oxide-based solid electrolyte material, to extract lithium from seawater, and a large-area membrane manufacturing process is conducted to extract a large amount of lithium per unit time. Through the developed manufacturing process, a large-area membrane with a diameter of approximately 20 mm and relative density of 96% or more is manufactured. The lithium extraction behavior from seawater is predicted by measuring the ionic conductivity of the membrane through electrochemical analysis.

Abstract
1. 서 론
2. 실험 방법
    2.1. 분리막 소재 합성 및 소결체 제조
    2.2. 전구체 및 제조된 분리막 특성평가
3. 결과 및 고찰
    3.1. 분리막 합성 및 소결 공정 최적화
    3.2. 제조된 분리막 특성평가
    3.3. 제조된 분리막 전기화학적 분석 및 대면적화
4. 결 론
Acknowledgement
References

• 김영일(한국생산기술연구원 한국희소금속산업기술센터) | Young Il Kim (Korea Institute for Rare Metals, Korea Institute of Industrial Technology)
• 박상철(한국생산기술연구원 한국희소금속산업기술센터, 인하대학교 신소재공학과) | Sang Cheol Park (Korea Institute for Rare Metals, Korea Institute of Industrial Technology, Department of Materials Science and Engineering, Inha University)
• 신광호(울산과학기술원 에너지화학공학과) | Kwang Ho Shin (School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology)
• 김인영(한국생산기술연구원 한국희소금속산업기술센터) | InYeong Kim (Korea Institute for Rare Metals, Korea Institute of Industrial Technology)
• 이기안(인하대학교 신소재공학과) | Kee-Ahn Lee (Department of Materials Science and Engineering, Inha University)
• 정성균(울산과학기술원 에너지화학공학과) | Sung-Kyun Jung (School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology)
• 이빈(한국생산기술연구원 한국희소금속산업기술센터, 과학기술연합대학원대학교 융합제조시스템공학과) | Bin Lee (Korea Institute for Rare Metals, Korea Institute of Industrial Technology, Convergence Manufacturing System Engineering, University of Science & Technology) Corresponding author