Detroit - As the motor industry scrambles to produce more affordable electric vehicles, whose most expensive components are the batteries, lithium iron phosphate is gaining traction as the EV battery material of choice.
The popularity of the chemical compound known as LFP is due partly to environmental and geopolitical concerns. But technological advances have also reduced the performance gap with more widely used materials such as nickel and cobalt.
LFP, embraced by EV industry leader Tesla two years ago, has sparked new interest especially in the US, where a clutch of domestic and overseas manufacturers has pledged more than $14 billion (R257bn) in new production facilities.
Overseas, two of the world's largest carmakers, Toyota and Hyundai, have both announced plans in the past week to equip their future vehicles with LFP batteries, but have not disclosed plans for the US.
“LFP is less expensive than cobalt and nickel, and all the minerals can be obtained here in North America (which means) much lower transportation costs and a more secure supply chain,” said Stanley Whittingham, professor at Binghamton University in New York and a 2019 Nobel laureate for his work on lithium ion batteries.
The addition of manganese, a staple ingredient in rival nickel cobalt manganese (NCM) battery cells, has enabled lithium iron phosphate cells to hold more energy than previously, providing EVs with more range — up to 724km on a single charge, Toyota said recently.
US-based firm Our Next Energy, is a proponent of LFP, according to founder and chief executive Mujeeb Ijaz, because “the materials are more abundant and sustainable, with far less risk” of fire.
“We’ve also demonstrated that you can match the range of cobalt cells with no compromise,” he said.
Tesla is among the carmakers leading the quest in markets outside of China to provide lower-priced EVs - in Tesla's case, targeting a base price of around $25 000 (R460 000). The use of LFP batteries should help Tesla and rivals to achieve that goal, experts say.
Ford also aims to open an LFP cell manufacturing plant in western Michigan, leveraging technology licensed from China’s CATL, the world’s largest EV battery maker. The goal, Ford CEO Jim Farley said in February, is to lower the carmaker’s cell costs to less than $70 a kilowatt-hour, from more than $100/kWh for current NCM cells.
More than 90% of LFP materials and components still come from China, said battery expert Shirley Meng, a University of Chicago professor and head of Argonne National Laboratory’s Collaborative Center for Energy Storage Science.
The rapidly increasing adoption of LFP by EV manufacturers including Tesla and Hyundai suggests those companies “are not ready to decouple from China," Meng said.
'Attractive proposition'
Battery expert Lukasz Bednarski, author of the 2021 book “Lithium: The Global Race for Battery Dominance and the New Energy Revolution,” believes automakers’ interest in building lower-priced EVs could be one of the drivers behind LFP’s rising popularity.
“LFP provides good enough performance at a lower cost, which makes it an attractive proposition for EVs for the middle class,” he said.
Battery makers from Norway, Israel, South Korea and even China have also committed to building US facilities to produce LFP materials, components and batteries, some of which will be used not in vehicles, but in large energy storage systems.
“LFP was invented in the US and first commercialised here,” said Whittingham. He said this happened before Chinese companies such as BYD and CATL “moved fast” to improve and deploy the technology, mainly in EVs.
Now, given its continued cost advantage over NCM, he added, LFP “should be used in all grid storage systems and lower-cost cars.”
Reuters