Skip to main content
. 2016 Feb 1;7:10601. doi: 10.1038/ncomms10601

Figure 6. Electrochemical performance of the 3D S@PGC (90% S) composite as a cathode material for Li–S batteries.

Figure 6

(a) CV profiles of the 3D S@PGC (90% S) composite cathode. (b–e) Charge/discharge curves of the cathode at charge/discharge rates of (b) 0.5 C, (c) 1 C, (d) 2 C and (e) 4 C. (f) Cycling performance of the cathode at charge/discharge rates of 1, 2 and 4 C. (g) EIS curves of the cathode before and after 200 cycles at 2 C. (h) Rate performance of the cathode. (i) Cycling performance of the cathode over 1,000 cycles at a charge/discharge rate of 2 C. The data indicate that the 3D S@PGC (90% S) composite displays excellent electrochemical performance, in particular, a high sulfur utilization, high specific capacity (1,115 mA h g−1 at 2 C), long cycling life (small capacity decay of 0.039% per cycle over 1,000 cycles at 2 C), and excellent rate capability at a high charge/discharge current. CV, cyclic voltammetry. EIS, electrochemical impedance spectroscopy.