Figure 5

(a) Rate capability at various current densities from 0.3 to 67.5 A g−1, and (b) Cycling stability and Coulombic efficiency versus cycle number over a long life of 5000 cycles at a high current density of 5 A g−1.
(a) Rate capability at various current densities from 0.3 to 67.5 A g−1, and (b) Cycling stability and Coulombic efficiency versus cycle number over a long life of 5000 cycles at a high current density of 5 A g−1.