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.

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• A Study on Particle and Crystal Size Analysis of Lithium Lanthanum Titanate Powder Depending on Synthesis Methods (Sol-Gel & Solid-State reaction)
  Jeungjai Yun, Seung-Hwan Lee, So Hyun Baek, Yongbum Kwon, Yoseb Song, Bum Sung Kim, Bin Lee, Rhokyun Kwak, Da-Woon Jeong
  journal of Korean Powder Metallurgy Institute.2023; 30(4): 324.     CrossRef