Essential for the production of electric vehicle (EV) motors, wind turbines, and various electronics, rare earth metal-based powerful permanent magnets may soon be in critical demand. Forecasts suggest that the supply of specific rare earth elements should ramp up by 2050, with an estimated sevenfold increase for wind turbine applications and a fifteenfold hike for EVs by 2040.
The term “rare earth” is somewhat misleading, as these elements are not exceedingly rare. However, challenges such as limited production sites and low natural concentrations pose significant hurdles for economic mining in the foreseeable future. With the anticipated demand surge, industry experts are calling for innovative technological solutions.
Innovation in Magnet Manufacturing: The Rise of Iron Nitride
Groundbreaking advancements are underway to eliminate the dependence on rare earth elements for magnet production. Tesla made headlines in 2023 with its announcement to forgo rare earth elements in it’s forthcoming EV models. Pioneering this initiative, Niron Magnetics, a startup based in Minnesota, is developing iron nitride magnets from abundantly available elements. Targeting a production milestone of 1,000 kilograms by the end of 2024, Niron Magnetics is not just crafting alternatives but also enhancing potential. Though the current performance of their magnets stands at 10 MGOe (mega-gauss-oersteds), there is scope for advancement to 20-30 MGOe, transcending the current capabilities of neodymium magnets.
Notably, iron nitride magnets are also cobalt-free, distancing the technology from the controversial cobalt mining practices which have been associated with environmental issues and human rights violations, particularly in the Congo.
Implications and Significance for Energy Transition
These innovative magnet technologies are more than just a workaround for rare earth shortages – they represent key components in the global fight against climate change. The advent of effective alternatives is imperative to sustain momentum in the energy transition. As stressed by Gregg Cremer, an advisor to the US Department of Energy’s ARPA-E, the availability of abundant and high-performing magnets is vital to achieving the goals set out for a greener future.
Addressing the rare earth dilemma with sustainable materials like iron nitride paves the way for a robust energy infrastructure that is less vulnerable to the resource scarcity and ethical issues tied to traditional rare earth element extraction. This progressive shift is poised to fortify the renewable energy sector and accelerate our transition towards a more sustainable, low-carbon world.
