Energy balance of lithium recovery by electrodialysis using La0.57Li0.29TiO3 electrolyte

•Lithium is recovered by electrodialysis using a solid electrolyte.•Electrodialysis involves the electrolysis of water.•The electrolysis of water consumes energy.•Diffusion impedance in the secondary solution generates the dominant overvoltage. The energy balance of lithium recovery by electrodialys...

Full description

Saved in:
Bibliographic Details
Published in:Fusion engineering and design 2021-09, Vol.170, p.112500, Article 112500
Main Authors: Sasaki, Kazuya, Hiraka, Ryosuke, Takahashi, Hiroto, Shin-mura, Kiyoto
Format: Article
Language:English
Subjects:
Diffusion rate
Electrodialysis
Electrolysis
Electrolytes
Energy balance
Energy recovery
La0.57Li0.29TiO3
Lithium
Lithium recovery
Overpotential
Solid electrolytes
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:•Lithium is recovered by electrodialysis using a solid electrolyte.•Electrodialysis involves the electrolysis of water.•The electrolysis of water consumes energy.•Diffusion impedance in the secondary solution generates the dominant overvoltage. The energy balance of lithium recovery by electrodialysis using the solid electrolyte La0.57Li0.29TiO3 was investigated using AC impedance spectroscopy and overpotential measurements. It was found that most input energy is consumed in the electrolysis of the water associated with electrodialysis. Despite the use of low-performing model electrodes and electrolyte plates with low Li+ conductivity, most of the overpotential was due to the diffusion impedance of the Li+ between the electrode surface and the offshore in the secondary solution. This suggests that reduction of the solution’s diffusion impedance is the key to increasing the lithium recovery rate in an energy-efficient way.
ISSN:0920-3796
1873-7196
DOI:10.1016/j.fusengdes.2021.112500