I am in the process of creating a somewhat hard military sci fi setting and was enamored by the idea of all-electric armored vehicles for a future war.
For this I decided to used Redox Flow Batteries: https://en.m.wikipedia.org/wiki/Flow_battery
I decided redox flow batteries were a good fit as it allowed the electrolyte of the batteries to be tranfered from one vehicle to another, meaning that armored vehicles could recharge themselves by filling up from a tanker vehicle that stored the electrolyte and recharged it using renewables or even portable nuclear sources.
This allows your "fuel" to be recycled between the tankers and the vehicles indefinitiely meaning that unless a tanker was destroyed or an accident happens and cause fuel leakage your forces could wove through wide swaths of enemy territory with minimal resupply.
They also have additional advantages of full discharge capability, very long cycle life, and have non-flammable electrolytes that don't explode like Li-ions.
Redox flow batteries are normally plagued with low power density issues however articles like the one below give me hope that future higher density electrolytes can be discovered:
The above article claims they can now reach the equivalent density of Li-ions, so considering future technology, for the purposes of this answer assume maybe 0.5 times better energy density than current Li-ions.
Would this system work for the sustainment of an armored division on extended combat operations?