Core–shell nano-FeS2@N-doped graphene as an advanced cathode material for rechargeable Li-ion batteries

Abstract

We report the formation of core–shell nano-FeS₂@N-doped graphene as a novel cathode material and its mechanism for use in rechargeable Li-ion batteries. A benefit of the amount of FeS₂ nano-crystals as the core for Li-ion storage with high capacity and using coated N-doped graphene as the shell is that FeS₂@N-graphene exhibits a remarkable specific energy (950 W h kg⁻¹ at 0.15 kW g⁻¹) and higher specific power (543 W h kg⁻¹ at 2.79 kW g⁻¹) than commercial rechargeable LIB cathodes, as well as stable cycling performance (∼600 W h kg⁻¹ at 0.75 kW g⁻¹ after 400 cycles).