Researchers have demonstrated calcium ion batteries (CIBs) using pigment electrodes such as Prussian blue and its analogues. The CIBs showed excellent cyclability of discharge and charge in a calcium-based organic electrolyte. This is thought to derive from strong atomic bonds in Prussian blue structures, which possess movable pathways for large-sized ions in three dimensions. Such unique structures have excellent potential for application in newly designed batteries.
from Geochemistry News -- ScienceDaily http://ift.tt/22MtVL9