Electrochemistry of Anodic Reaction in Molten Salt Containing LiOH for Lithium-Hydrogen Energy Cycle

Y. Sato, O. Takeda, M. Li, M. Hoshi

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

To establish an efficient hydrogen storage and transportation system, LiH is a promising medium material because of its larger hydrogen storage capacity and easy handling based on its chemical stability. LiH generates hydrogen by reacting with H2O and remains as LiOH as the by-product. In the system, LiOH must be returned to lithium metal to regenerate LiH again. The electrolytic winning of lithium metal from LiOH was investigated as part of the study on the hydrogen utilization system using LiH. However, LiOH reacts with lithium metal and makes the electrolysis difficult. Therefore, LiCl-KCl eutectic melt was used as the electrolyte, and the cathode and anode compartments were separated by a porous diaphragm in order to prevent contact between lithium deposited and LiOH in the electrolyte. The electrolysis was carried out by feeding LiOH into the anode compartment. As a result, the lithium metal was successfully obtained from LiOH without chlorine evolution by electrolysis with a high current efficiency, higher than 90%.

Original languageEnglish
Title of host publicationMolten Salts Chemistry and Technology
PublisherWiley-Blackwell
Pages563-567
Number of pages5
Volume9781118448731
ISBN (Electronic)9781118448847
ISBN (Print)9781118448731
DOIs
Publication statusPublished - 2014 Jun 23

Keywords

  • Energy cycle
  • Lithium-hydrogen

ASJC Scopus subject areas

  • Chemistry(all)

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