According to the source below, aluminum has higher energy density than iron (23.5kWh/L versus 16.7kWh/L). The entry for iron in the link below is also higher t

According to the source below, aluminum has higher energy density than iron (23.5kWh/L versus 16.7kWh/L). The entry for iron in the link below is also higher than the iron energy density reported in the parent link (11/3 kWh/L). https://onlinelibrary.wiley.com/doi/full/10.1002/ente.202000233 https://onlinelibrary.wiley.com/doi/full/10.1002/ente.202000... Of course, aluminum used in this way is the classic thermite reaction; I conjecture that the iron reaction is also. https://en.wikipedia.org/wiki/Thermite https://en.wikipedia.org/wiki/Thermite