Rendering of how the Hell's Kitchen plant and lithium recovery facility will look. Image: CTR. Decarbonisation through electrification and increased use of renewable energy are considered the biggest drivers of demand for lithium-ion batteries for grid storage and electric transport. However, from the supply-side, sustainability is a growing concern and area of interest for the clean energy sector. LG Energy Solution recently signed a six-year lithium concentrate off-take contract with Sigma Lithium, with the supplier seeking to bring large volumes of what it called "green and sustainable" high purity lithium to the global market.