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Electrochemical Lithium Recovery System Adopting Zinc as Negative Electrode : 음극재로 아연을 도입한 전기화학적 리튬회수시스템
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- Authors
- Advisor
- 윤제용
- Major
- 공과대학 화학생물공학부
- Issue Date
- 2017-02
- Publisher
- 서울대학교 대학원
- Keywords
- lithium recovery
- Description
- 학위논문 (석사)-- 서울대학교 대학원 : 화학생물공학부, 2017. 2. 윤제용.
- Abstract
- Securing lithium resource is an emerging issue owing to widespread use of lithium-ion batteries. Currently, over 80 % of lithium is produced by evaporation process from brines located in South America. This process requires a lot of time, additional purifying steps and causes environmental problems. Recently, electrochemical method based on the principle of lithium-ion battery was proposed to meet increased demand for lithium. However, in the electrochemical lithium recovery system, pricey silver is used as negative electrode and its cost is a major hindrance for proceeding to the stage of practical application. Herein, we proposed zinc as alternative material, which is low-priced and has various benefits of being used as a negative electrode. By electrochemical analysis, we demonstrated the suitability of zinc electrode for lithium recovery system in terms of stability, efficiency and the feasibility of system operation. In the zinc-employed system, zinc was reversibly oxidized and reduced during the lithium recovery process without side reactions and weight loss, and lithium was selectively recovered with energy consumption of 6.3 Wh per 1 mole of lithium recovery.
- Language
- English
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