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Japan's Toyota, SMM eye joint battery materials output

  • Market: Battery materials, Metals
  • 08/10/25

Japanese automaker Toyota and trading house Sumitomo Metal Mining (SMM) have agreed to jointly develop and produce cathode materials for all solid-state batteries used in battery electric vehicles (BEVs), as part of SMM's efforts to revamp its battery materials involvement.

SMM is looking to supply the newly developed cathode material and is gunning for mass production, said the two firms on 8 October, while Toyota is targeting to launch BEVs equipped with all solid-state batteries in the market in 2027-28. Joint research between the two firms on cathode materials for all solid-state batteries began in 2021 and they have developed a "highly durable" material, they said.

Hybrid EVs continued to drive global EV sales by Toyota and its luxury division Lexus in April-June. The firms sold 1.165mn units of hybrid EVs in the period, up by 17pc on the year, while sales of plug-in hybrid EVs and BEVs each totalled only 47,000 units respectively.

SMM earlier this year outlined its new business plans for the coming three financial years, including a focus to rebuild its battery materials business. The firm suffered setbacks from its longstanding focus on nickel-cobalt-aluminum oxide (NCA) materials owing to a rapid market shift from NCA to high-nickel nickel-manganese-cobalt (NCM) cathode materials. It had close to 60,000 t/yr of NCA production capacity.

But a switch in product focus took place as soon as the firm realised the market shift. "We had no choice but to halt existing equipment and change the production process, which led to a decline in the production and sales volumes of nickel-based cathode materials," said SMM in May. Its battery materials business recorded ¥57.3bn ($374mn) in impairment losses over its April 2024-March 2025 financial year.

SMM also has a long-term capacity target of 150,000 t/yr for nickel and 300,000 t/yr for copper. But it warned its investors of tailwinds over the next three years, citing prolonged nickel oversupply given strong Indonesian output, slumping copper treatment and refining charges and new copper smelter capacities.


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