A liquified air storage system can include a container assembly. The container assembly can be disposed on a base. The container assembly can have an interior portion and an exterior portion. The interior portion can include a reinforced concrete layer and a steel liner. The exterior portion can be disposed adjacent to the interior portion, the exterior portion including prestressed wire. A method of assembling a liquified air storage system can include assembling an interior portion of a container assembly. The interior portion can have a reinforced concrete layer and a steel liner. Next, an exterior portion of the container assembly can be assembled on the interior portion. The exterior portion can include a composite material and prestressed wires. The exterior portion can be covered with an insulation layer.