Lithium-rich disordered rock salt Li1.25V0.5Nb0.25O2 as the anode material for lithium-ion capacitors

Abstract

DRX–Li_1.25V_0.5Nb_0.25O₂ is innovatively deployed as a lithium-ion capacitor (LIC) anode, exhibiting a specific capacity of 178 mAh g⁻¹ at 0.1 A g⁻¹ with unattenuated cycling over 1000 cycles. Full LIC devices achieve 45.1 mAh g⁻¹ and 76.3% capacity retention after 2000 cycles, expanding the application scope of DRX materials as anodes.