Application of a Flow-Type Electrochemical Lithium Recovery System with λ-MnO2/LiMn2O4: Experiment and Simulation

Hwajoo Joo, Seon Yeop Jung, Seoni Kim, Kyung Hyun Ahn, Won Sun Ryoo, Jeyong Yoon

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

Due to the rapid growth of the global electric vehicle and electronics markets, lithium has become an indispensable resource for our lifestyle, and numerous methods for securing lithium are being actively attempted. For fast and environment-friendly lithium extraction, the electrochemical lithium recovery (ELR) system was studied in recent years. However, there are a limited number of studies regarding the system behavior and most of them are focused on a batch operation, which is far from practical usage. In this study, a flow-type rocking-chair ELR system based on the λ-MnO2/LiMn2O4 electrode pair is proposed for efficient recovery of lithium ions from influents. A lab-scale electrochemical experiment and a two-dimensional numerical simulation are performed to comprehensively analyze the system behavior. It is confirmed that lithium can be simultaneously captured and released at each electrode without any extra electrode regeneration steps. Apart from identifying its behavior experimentally, the spatiotemporal concentration distribution of Li+ in the separator channel is analyzed through numerical simulation. In our system, Li+ is found to be successfully recovered from the source with an energy consumption of 0.56 Wh mol-1 at 6.25 × 10-2 mA cm-2.

Original languageEnglish
Pages (from-to)9622-9631
Number of pages10
JournalACS Sustainable Chemistry and Engineering
Volume8
Issue number26
DOIs
StatePublished - 6 Jul 2020

Bibliographical note

Funding Information:
This research was supported by the Technology Innovation Program (10082572, Development of Low Energy Desalination Water Treatment Engineering Package System for Industrial Recycle Water Production) funded by the Ministry of Trade, Industry & Energy (MOTIE, Korea) and the National Research Foundation of Korea (NRF) funded by the Korea government (MEST and MSIT, Korea) (NRF-2016R1D1A1A02937469 and NRF-2018R1A5A1024127).

Publisher Copyright:
Copyright © 2020 American Chemical Society.

Keywords

  • Electrochemical lithium recovery
  • Flow-type reactor
  • Lithium ion battery
  • Lithium manganese oxide
  • Two-dimensional numerical simulation

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