Carbon nanospheres (CNSs) are prepared with natural gas as a carbon source. The resulting sample as an anode material for LIBs delivers a reversible capacity of 552 mA h g⁻¹ at a current density of 0.05 A g⁻¹ with an initial coulombic efficiency of 68%. Moreover, the rate capability is evaluated at different current densities from 0.05 to 5 A g⁻¹, and the coulombic efficiency can still be maintained above 90% after 300 cycles.