Project

Membrane electrolysis for resource-efficient lithium and water recovery from brines

Code
3G0I1818
Duration
01 April 2018 → 30 November 2022
Funding
Research Foundation - Flanders (FWO)
Research disciplines
No data available
Keywords
membrane electrolysis lithium
 
Project description

The electrification of our world drives a fast increase in demand for lithium, to be used mainly for batteries in electric vehicles and power

storage from renewable but intermittent energy sources. Unfortunately, the most common methods to extract lithium belie the role in

sustainability it is supposedly playing: lithium extraction from brines requires long-term and huge volumes of water evaporation, high

chemical usage and production of waste. With the Li+WATER project we propose a radically new, electrochemical process. We will in three

stages, driven by renewable electricity and without input of chemicals, harvest not just the lithium but also other products present in the

brines such as magnesium hydroxide, as well as recover the water. The latter is very important, as particularly the region in South America

where most brines are found is water-short. The flexibility of our process will also enable turning towards less optimal, today uneconomic

lithium sources, such as geothermal brines present in Europe. Key to our development will be an adequate understanding of how lithium can

be electrochemically harvested in the presence of variable concentrations of other ions (Ghent University focus). This will in turn allow

testing on real brines (Universidad Nacional de Jujuy focus), and finally perform technical, economic and environmental assessment of the

future process (Swedish Environmental Research Institute focus). If successful, Li+WATER will for the first time couple the role of lithium in

sustainable development to a sustainable harvesting approach.