Copper is also a strong antibacterial agent and electric vehicles contain large quantities of that, also. But there are two main differences: copper is widely recycled and copper is not typically used in nanoscale materials in BEVs (to my knowledge). Nanoscale materials tend to be worrisome since they often are more bio-interactive than macro-scale materials.
One thing is clear: If we do not learn to recycle the batteries in BEVs, then the benefit that the vehicles can be fueled by renewable energy is lost to the fact that we need to continuously mine new raw materials to build new batteries. In addition to the damage caused by the mining operations, we will continue to pollute the environment with the waste of discarded batteries. Improving the longevity of the batteries will help some. but it is not a substitute for recycling.
This is one reason why the dual-carbon battery from Power Japan Plus
appeals to me. Unfortunately, the new website appears to only reference "hybrid cars" and does not refer to BEVs. However, reading the website does not give a clue as to why this might be. They claim to have have slightly-lower cathode capacity, but operate at 5V and are not damaged by deep discharge, which should compensate for the difference. They also indicate that they have no cost disadvantage. Perhaps they simply want to pursue applications which require smaller batteries first.