In a study, researchers have made an interesting discovery. They found that the soot from diesel engines on merchant ships can be used to create lithium-ion batteries. For the study, the researchers obtained soot from several ships currently in operation and then heated it to 2700°C to remove impurities such as sulfur and nitrogen.
It was then cooled and examined using high powered microscopes which found that the soot was transformed from its original form and now resembled an almost perfectly crystalline graphite structure. The newly formed soot based product was tested for electrical conductivity, and when compared to the commonly-used artificial graphite material it was found to be very similar.
While this is a very promising discovery, more testing has to be done before this renewable alternative becomes mainstream.