RE:Alternate battery technologiesThinking of battery technologies is like thinking of different types of cumbustion engines: diesel, gas, natural gas, low octane, high octane, ....
Nickel will always have a place in the mix of battery technologies and most likely will be the dominant metal in use for a very long time due to the energy density that comes with it.
For a deep dive on Nichel's role and various battery chemistries from LFP to NCA to NMC, check out this great article from ING:
Electric vehicles to drive metals demand higher
GLTA.