In the EV vehicle manufacturing process, lithium-ion battery (LIB) manufacturing makes up a large proportion of CO₂ emissions. Of those, the CO₂ emissions derived from the cathode starting materials account for the largest proportion. In the manufacture of cathode materials, Proterial therefore developed a technology that can produce cathode materials without going through the previously required process of converting nickel into Ni(OH)₂ (nickel hydroxide) to produce the precursor, which is the starting material. Through this technological development, it became possible to reduce CO₂ emissions during cathode material manufacturing by 20% or more when compared with the production method based on the solid phase reaction method established by our company.