As far as the cobalt metal in the battery is concerned, it is a rare metal in itself, and it is also one of the most expensive metal materials in automotive battery materials. Data shows that the domestic reference price of cobalt metal on February 18 was 277,500 yuan/ton. Therefore, the current cost of a cobalt-free lithium iron phosphate battery is 0.6/wh, and the cost of a ternary lithium-ion battery with cobalt reaches 0.85/wh. Therefore, it is not difficult to see that the cobalt-free battery has advantages in processing cost.
Take the non-cobaltized battery lithium iron phosphate battery as an example, the service life is longer. Calculated according to overflowing discharge, the current cycle life of lithium iron phosphate batteries can reach about 2000 times, while the number of cycles of overflowing ternary lithium-ion batteries is about 1000 times. Therefore, longer service life is also one of the advantages of cobalt-free batteries.
At present, ternary lithium-ion batteries on the market are more used in family cars, and cobalt-free batteries are used in passenger cars, public transportation vehicles or electric logistics vehicles. According to current use, there are few safety incidents in buses. However, numerous spontaneous combustion incidents have been caused by batteries in family cars. And in theory, cobalt-free batteries are safer than ternary lithium-ion batteries.