Fishlike Nanorobots Could Become America’s Answer to China’s Lithium Grip

Lithium, a crucial mineral in technology and energy sectors, has become a geopolitical concern due to China's dominant control over global lithium supplies and refining capacity. With China controlling a quarter of the world's lithium mining and 60% of the world's refining capacity, the country is gaining significant geopolitical leverage.

As the world transitions to clean energy, demand for lithium is expected to increase by ten times between 2020 and 2030, with an electrified economy in 2030 requiring 250,000 to 450,000 tonnes. Currently, the world produces only 105,000 tonnes of lithium annually, with Chinese companies controlling most of the production and refining capacity.

To address this imbalance and reduce China's geopolitical leverage, the United States aims to diversify battery supply chains and produce primary materials domestically. The country has natural lithium deposits, particularly in Nevada and Arkansas, with one functioning lithium mine in Nevada. However, traditional lithium extraction methods have significant environmental drawbacks, including water demand and hazardous waste production.

Researchers at Texas A&M University are developing fishlike nano-robots that can extract lithium directly from seawater, eliminating the environmental downsides of traditional methods. These micro/nanorobots move freely through seawater to harvest lithium with minimal infrastructure footprint. Supported by a million-dollar grant from the US Department of Energy, the project aims to create a more reliable domestic lithium supply chain and reduce environmental impact.

The Department of Energy is funding 19 projects to build up domestic lithium supply chains, in response to the growing demand and China's dominance. Another project from Argonne National Laboratory and the University of Chicago uses a vermiculite membrane to efficiently filter lithium ions from seawater, offering a potential domestic alternative to traditional mining. These initiatives aim to strengthen the United States' energy security and independence from Chinese control over critical minerals.