Waste-to-Energy Innovation: Toyota Chemical Engineering Pursues a Carbon-Free Future Through Garbage Incineration Technologies
In the quest for a greener future, disposing of spent batteries from electrified vehicles has emerged as a growing concern. However, Toyota and Toyota Chemical Engineering are tackling this challenge head-on, aiming to find a recycling technology with lower emissions.
The trio of batteries pictured—a nickel metal hydride battery (NiMH), a lithium-ion battery used in hybrid cars, and a lithium-ion battery from a bZ4X—represent the focus of this innovative endeavour.
Toyota Chemical Engineering, a powerful partner in Toyota's efforts to achieve circularity in battery recycling, has been collecting and recycling spent batteries from Toyota Hybrid Electric Vehicles (HEVs) in Japan since 2010.
The process begins with spent batteries being transferred into equipment and filled with an electrolytic solution for easier movement of ions. After the fluid is extracted, the cells are shredded and sorted, recovering materials like aluminum, iron, and a powder called "black mass" containing rare metals.
The highly flammable electrolytic fluid poses a fire risk, but the facility can distill and extract it. This technology combines detoxification without burning with existing recycling technology, increasing recovery rates.
Keisuke Isomura, a key figure at Toyota, emphasises the development and verification of low-emission disposal methods for Toyota's goals of a circular economy and carbon neutrality. Kenichiro Muramatsu notes that this approach offers significant benefits, including reducing CO2 emissions and improving recovery rates.
In Europe, regulations requiring battery manufacturers to use a fixed ratio of rare metals recovered from spent batteries will take effect in 2031. This trend is mirrored worldwide, with countries promoting recycling to recover rare metals like cobalt, lithium, and nickel from spent batteries.
Being environmentally conscious does not mean imposing limits, according to Chief Sustainability Officer Yumi Otsuka. Instead, she highlights the business opportunities in circularity to reduce environmental impact. The sorted pieces and powders are transported to cooperating companies and processed into materials for new batteries.
Toyota Chemical Engineering's battery recycling process without burning contributes to carbon neutrality by avoiding the substantial CO2 emissions associated with traditional high-temperature (smelting or burning) recycling methods and by efficiently recovering valuable materials, thereby reducing the demand for mining new raw minerals. This method enhances recovery rates by enabling material reclamation with minimal environmental impact, supporting a more sustainable, circular battery economy.
In summary, Toyota Chemical Engineering’s non-burning battery recycling method helps advance carbon neutrality by minimising carbon emissions associated with battery recycling and improves recovery rates by preserving more recyclable materials, fostering a more sustainable EV battery lifecycle.
The black substances in the picture are the result of a process called "special recycling" on car batteries. Toyota is performing verification testing on battery recycling without burning, with the test plant marking the first step in transforming spent batteries into new ones, without incineration. Toyota Chemical Engineering is also working on various technologies, including making electricity from water and garbage, and industrial waste disposal using incineration without CO2 emission.
- In alignment with Toyota's vision for a circular economy and carbon neutrality, the company is making strides in environmental-science by focusing on the recycling of spent batteries, particularly lithium-ion batteries, reducing CO2 emissions and improving recovery rates.
- Finance plays a crucial role in the advancement of this environmental-science, as regulations in Europe and beyond are mandating the use of rare metals recovered from spent batteries, creating opportunities for business and energy sectors.
- To further minimize its environmental footprint, Toyota Chemical Engineering is developing technologies beyond battery recycling, such as generating electricity from water and garbage, and disposing of industrial waste without CO2 emissions, thus expanding the scope of climate-change mitigation efforts in the industry.
