| May 31, 2023 |
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(Nanowerk News) Electrification and digitalisation are leading to a steady increase in the need for critical metals* in the EU’s vehicle fleet. Moreover, only a small proportion of the metals are currently recycled from end-of-life vehicles. The metals that are highly sought after, such as dysprosium, neodymium, manganese and niobium, are of great economic importance to the EU, while their supply is limited and it takes time to scale up raw material production. Our increasing dependence on them is therefore problematic for several reasons.
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“The EU is heavily dependent on imports of these metals because extraction is concentrated in a few countries such as China, South Africa and Brazil. The lack of availability is both an economic and an environmental problem for the EU, and risks delaying the transition to electric cars and environmentally sustainable technologies. In addition, since many of these metals are scarce, we also risk making access to them difficult for future generations if we are unable to use what is already in circulation”, says Maria Ljunggren, Associate Professor in Sustainable Materials Management at Chalmers University of Technology.
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A serious situation, but Swedish deposit offers hope
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Ljunggren points out that the serious situation affecting Europe’s critical and strategic raw materials is underlined in the Critical Raw Materials Act recently put forward by the European Commission. The Act emphasises the need to enhance cooperation with reliable external trading partners and for member states to improve the recycling of both critical and strategic raw materials. It also stresses the importance of European countries exploring their own geological resources.
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In Sweden the state-owned mining company LKAB reported on significant deposits of rare earth metals in Kiruna at the start of the year. Successful exploration enabled the company to identify mineral resources of more than a million tonnes of oxides – which they now describe as the largest known deposit of its kind in Europe.
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“This is extremely interesting, especially the discovery of neodymium which, among other things, is used in magnets in electric motors. The hope is that it will help make us less dependent on imports in the long run,” she says.
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Substantial increase in the use of critical metals
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Together with the Swiss Federal Laboratories for Materials Science and Technology, EMPA, Ljunggren has surveyed the metals that are currently in use in Europe’s vehicle fleet. The assignment comes from the European Commission’s Joint Research Centre (JRC), and has resulted in an extensive Raw Materials in Vehicles database that shows the presence over time of metals in new vehicles, vehicles in use and vehicles that are recycled.
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The survey, which goes back as far as 2006, shows that the proportion of critical metals has increased significantly in vehicles, a development which the researchers believe will continue. Several of the rare earth elements are among the metals that have increased the most.
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“Neodymium and dysprosium usage has increased by around 400 and 1,700 percent respectively in new cars over the period, and this is even before electrification had taken off. Gold and silver, which are not listed as critical metals but have great economic value, have increased by around 80 percent,” says Ljunggren.
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The idea behind the survey and the database is to provide decision-makers, companies and organisations with an evidence base to support a more sustainable use of the EU’s critical metals. A major challenge is that these materials, which are found in very small concentrations in each car, are economically difficult to recycle.
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Recycling fails to meet requirements
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“If recycling is to increase, cars need to be designed to enable these metals to be recovered, while incentives and flexible processes for more recycling need to be put in place. But that’s not the current reality”, says Ljunggren, who stresses that a range of measures are needed to deal with the situation.
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“It is important to increase recycling. At the same time, it is clear that an increase in recycling alone cannot meet requirements in the foreseeable future, just because the need for critical metals in new cars is increasing so much. Therefore there needs to be a greater focus on how we can substitute other materials for these metals. But in the short term it will be necessary to increase extraction in mines if electrification is not to be held back”, she says.
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