The "advantage" is that in contrast to heavy metals like lead lithium is a lot less toxic as far as we know. Not 0, but not in the same league.
One example I can give of that is the fact that Alaska is home for the largest salmon fishery in the world, a fishery that is more valuable as a food resource than any gold you can extract from the headwaters of Lake Iliamna.
Not really true. There are plenty of non-toxic elements in the ground.
The actual issue with mining is that the elements we are after are often surrounded by the likes of arsenic. Gold is a great example of this as veins of it are often right along and in arsenic.
That said, I do agree about being conscious of what sort of undesirables get leached out from the stuff we pull from the ground. For example, I recently learned that the reason we have to be worried about mercury in ocean fish is because mercury is a major part of the pollutants spewed from coal plants.
Carrots?
BTW, lithium itself is highly toxic too.
Cobalt is neither particularly toxic nor a heavy metal. In fact, it's a part of vitamin B12. You might be thinking of Cadmium, which is indeed a very toxic and nasty metal.
In LiPos the heaviest metals are Iron and Nickel. That's by design. Heavier metals tend to be more expensive to procure.
In trace amounts, by both weight and volume lithium batteries are mostly nickel and/or iron.
> There are other toxic substance like phosphorus in "lithium" batteries. Some "lithium" battery chemistries
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> BTW, lithium itself is highly toxic too.
Both phosphorous and lithium are fertilizers. Yes, taking in a very large dose of both is poisonous, but the same is true of salt.
Chronic cobalt ingestion has caused serious health problems at doses far less than the lethal dose. In 1966, the addition of cobalt compounds to stabilize beer foam in Canada led to a peculiar form of toxin-induced cardiomyopathy, which came to be known as beer drinker's cardiomyopathy.[212][213]
Cobalt metal is suspected of causing cancer (i.e., possibly carcinogenic, IARC Group 2B) as per the International Agency for Research on Cancer (IARC) Monographs.[214]
It causes respiratory problems when inhaled.[215] It also causes skin problems when touched; after nickel and chromium, cobalt is a major cause of contact dermatitis.[216]