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Market for Electric Vehicle Powertrain Materials to Reach $47 bn by 2030 – Research Report

Traction batteries and motors in electric vehicles (EVs) are very different to the powertrain components of the internal-combustion engine vehicles they replace.

Their meteoric rise will lead to much greater demand for several materials markets which otherwise would see only modest growth. For example, while the combustion engine and transmission relies heavily on aluminum and steel alloys, Li-ion batteries alone also require a great deal of nickel, cobalt, aluminum, lithium, copper, insulation, thermal interface materials and much more at the cell and pack level.

A new report from IDTechEx, “Materials for Electric Vehicles 2020-2030”, identifies and analyses trends in electric vehicle battery cell- and pack-level materials, and electric traction motor materials, to determine the overall materials demand from the construction and future improvements of these components.

For each, a granular breakdown is used to forecast each material required and its market value over the next 10 years.

Battery Cell Materials

Several of the raw materials used in electric vehicle components have questionable mining practices or volatile supply chains, leading OEMs to change the way they make batteries and motors. A commonly used cathode material, cobalt, has famously questionable mining practices.

It is also a very expensive material with its supply and mining confined to a large majority in China and the Democratic Republic of Congo. As a result, OEMs are trending towards the use of higher nickel cathode chemistries such as NMC 622 and even NMC 811 in some new vehicles.

Another significant trend is the phase-out of LFP cathodes. The Chinese electric car market was, up until 2018, predominantly using LFP cathodes. This has now transitioned so that in 2019 only 3% of new cars were using LFP. However, the introduction of the Tesla Model 3 in China, using LFP could upset this trend.

Despite the reduction in the market share of materials like cobalt, the rapidly increasing market for electric vehicles will drive demand for cobalt and many other materials drastically higher over the next 10 years.

Battery Pack Materials

Cell energy density is increasing.  So is the pack energy density. With manufacturers improving their battery designs, the mass of materials being used around the cells is steadily being reduced, allowing for a lighter battery pack or more cells to be used for the same mass. This can be largely affected by the choice of material for the enclosure, with OEMs becoming more interested in composite utilization.

The thermal management strategy also has a significant impact. This includes the choice of active or passive cooling variants, thermal interface materials, thermal runaway prevention and fire-retardant materials. With greater energy density and consumer demand for fast charging, more effective thermal management is required in a smaller and lighter package. This may lead to a decrease in many battery pack materials per vehicle. But this is likely to be overshadowed by the total market increase for EVs.

Electric Motor Materials

Alongside the batteries, the demand for electric traction motors will increase rapidly over the next 10 years, not just from the overall vehicle sales but also with the rise of vehicles using more than one motor, specifically in premium cars and heavy-duty vehicles. Critical to materials, the majority of the EV market is using motors with permanent magnet-based rotors.

These materials typically contain several rare-earths such as neodymium and dysprosium, both of which have a very geographically constrained supply chain and a volatile price history. Whilst they are in a relatively small quantity in the motor, they can make up a very significant portion of the cost of the motor. 

Some manufacturers like Renault, for instance, are using motors with no magnets. Whereas Tesla has transitioned to a magnet-based motor for the potential improvements in efficiency which can increase range and hence, reduce the requirements for other critical battery materials.

Another key question in motor design comes from recyclability. Often overlooked at the development stage, when a motor/vehicle reaches end of life, is it easy to remove the expensive, critical materials used in the magnets or windings?

Most current designs do not take this into account. And whilst some manufacturers are switching to motors with less expensive or easier to recycle raw materials, the vast majority of the market is focusing on incremental improvements to the efficiency of current designs.

For more information on the materials used in the powertrain of electric vehicles, their demand, trends in utilization and market values, please see the new report from IDTechEx – “Materials for Electric Vehicles 2020-2030”. An extensive database of electric passenger cars, collated by IDTechEx, is further used to determine trends in the battery cell and pack energy density, energy capacity, cell geometry, cell chemistry, thermal management strategy, motor technology and power output, leading to a comprehensive set of material demands and market value forecasts.

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