Batteries, Vol. 7, Pages 54: Layered Iron Vanadate as a High-Capacity Cathode Material intended for Nonaqueous Calcium-Ion Batteries
Batteries doi: 10. 3390/batteries7030054
Authors: Munseok S. Chae Dedy Setiawan Hyojeong J. Kim Seung-Tae Hong
Calcium-ion batteries represent an encouraging option to the current lithium-ion batteries. Nevertheless, calcium-ion intercalating materials in nonaqueous electrolytes are scarce, probably because of to the difficulties in finding suitable host materials. Considering that research into calcium-ion batteries is in its infancy, discovering and characterizing brand new host materials would become critical to further development. Here, we demonstrate FeV3O9∙1. 2H2O as a high-performance calcium-ion battery cathode material that delivers a reversible discharge capacity of 303 mAh g−1 with a good cycling stability and a good average discharge voltage of ~2. 6 V (vs. Ca/Ca2+). The material has been synthesized via a facile co-precipitation method. Its reversible capacity is the best among calcium-ion battery components, and it is the first instance of a material with a capacity much larger than that of standard lithium-ion battery cathode components. Bulk intercalation of calcium supplements into the host lattice contributed predominantly towards the total capacity at a lesser rate, but became similar to that due to surface adsorption at a higher rate. This stimulating finding will lead to the growth of new strategies just for obtaining high energy thickness calcium-ion batteries.