The invention relates to materials for use as electrodes in an alkali-ion secondary battery, particularly a lithium-ion battery. The horizontal supporting tab has a first hinge that enables movement of the supporting tab relative to the panel body, preferably to about 90 degrees, into a position for supporting the first panel. A consistent instant virtual copy operation is performed for each of the one or more control volume pairs for which the freeze indicator is set to indicate that the freeze is to occur.