An added advantage of the coating is that the PCM is directly applied to the cell and does not require any external supports. In the CPCMs presented in Table , a variety of methods of attachment to the cell have been used; including external clamping which would add mass to the cell. CPCMs that do not make use of external clamping will form an interconnected network trapping the cells within the foam. The interconnected network can make the implementation of a hybrid BTMS difficult, whereas the coating would be easier to integrate into a hybrid system.