Figure 8

(a) CV curves of the 3.0MF and recycled 3.0MF at a scan rates 20 mv s−1; (b) CV curves of the recycled 3.0MF at different scan rates; (c) discharge curves of the recycled 3.0MF at different current densities; (d) EIS spectra of the recycled 3.0MF before and after the durability testing; (e) cycle performance of the recycled 3.0MF at 5 A g−1 for 2000 cycles.