Layered BaV6O16·3H2O@GO as a high performance cathode material for calcium ion batteries

Abstract

The lack of suitable cathode materials has hampered the further development of calcium-ion batteries (CIBs). A novel composite cathode material, namely BaV₆O₁₆·3H₂O@GO, was fabricated, which delivers a high specific capacity of 285.72 mA h g⁻¹ at 50 mA g⁻¹ after 50 cycles and a long cycle life, benefiting from a large layer spacing and robust structure. This study provides guidance for the development of vanadium-based cathode materials for CIBs.