Fig. 5

a CV curves at scan rate 0.2 mV s⁻¹ between 0 and 3 V and b discharge/charge profiles at a current density of 0.1 A g⁻¹ of MoS₂/C nanospheres; c the cycling performance of MoS₂ and MoS₂/C nanospheres at a current density of 0.1 A g⁻¹ for 100 cycles; d rate performance of two samples at various current rates range from 0.1 to 2 A g⁻¹; e long-term cycling performance of two samples at a current density of 1 A g⁻¹ for 500 cycles