Summary
- Lithium extraction from alternate sources is crucial for renewable energy transition and resource independence in countries like the United States
- Researchers at George Washington University have developed a novel technique to extract and purify lithium from geothermal brines for electric vehicle batteries
- The method is environmentally friendly and cost-competitive, and seeks to address the global demand for lithium
- Lead researcher Xitong Liu and the team proposed a solution using geothermal brines from sources like the Salton Sea in California
- The study was published in Nature Communications and demonstrates a process for extracting and converting lithium into battery-grade lithium hydroxide
Article
Researchers at George Washington University have developed a novel technique for extracting and purifying lithium from geothermal brines, which can be used to create batteries for electric vehicles. This method involves using a unique substance to selectively extract lithium ions from the brine, transforming them into lithium hydroxide, the grade suitable for EV batteries. The approach is cost-effective and environmentally friendly, as it avoids the use of harsh chemicals that could harm the environment.
The current lithium supplies from sources like hard rock mining and salt flats are insufficient to meet future global demand. The researchers propose using geothermal brines, specifically from sources like the Salton Sea in California, as an alternative and environmentally beneficial source of lithium. The team’s technology will be tested at scale in the coming years, offering a promising solution to the growing demand for lithium in the renewable energy sector.
The study, titled “Electro-driven direct lithium extraction from geothermal brines to generate battery-grade lithium hydroxide,” was published in Nature Communications. Lead researcher Xitong Liu, a professor at George Washington University, worked alongside a team of researchers to develop this innovative lithium extraction method. The team includes experts in various fields such as civil and environmental engineering, material science, and chemistry, among others.
The process of lithium extraction from geothermal brines involves several steps, including the electro-driven extraction of lithium ions from the brine, conversion into lithium hydroxide, and subsequent transformation into lithium chloride. These processes are demonstrated in schematics provided by the researchers, showcasing the efficiency and effectiveness of their approach. The technology holds the potential to produce high-quality battery-grade lithium at a competitive cost.
The researchers emphasize the importance of finding alternative sources of lithium for the renewable energy transition and achieving resource independence, especially in countries like the United States. By developing eco-friendly methods of lithium extraction, such as the one proposed in this study, researchers can contribute to the growth of the electric vehicle industry and reduce reliance on fossil fuels. The team’s work exemplifies the innovative solutions needed to advance the cleantech revolution and address global energy challenges.
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