One-pot synthesis of small-sized Ni_3S_2 nanoparticles deposited on graphene oxide as composite anode materials for high-performance lithium-/sodium-ion batteries

摘要

In this work, small-sized Ni3S2 nanoparticles (similar to 30 nm), deposited uniformly on a flake-like graphene oxide (Ni3S2/GO) were synthesized facilely by a simple one-pot method of wet chemical route for lithium-/sodium-ion battery applications. Ni3S2/GO was used as the anode material, a reversible capacity of 829.3 mAh/g at 100 mA/g after 50 cycles was achieved for lithium storage at the current densities of 1.0 and 5.0 A/g and specific capacities of more than 1122.3 and 233.2 mAh/g over 500 and 1000 loops respectively. Results show excellent cycling performance in the sodium storage with reversible capacity of 249.2 mAh/g at 100 mA/g after 50 cycles. The improved electrochemical performance was attributed to the synergistic effect of small-sized Ni3S2 nanoparticles and uniform GO sheets. This synergistic effect makes Ni3S2/GO nanocomposite a promising anode material for lithium-/sodium-ion batteries.