The Focus Fusion Society › Forums › Focus Fusion Cafe › Cheap antimatter! Another source of energy? › Reply To: FUSION Power for SHIPPING [] NO Co,Co2 Emission;No Oxgen Depletion ;NOx is absobed[]No Damage to Environment.
It would indeed be the most dense energy storage medium. About the only other thing I know of that might come close to that kind of density is nuclear isomers.