Figure 6

(a) CV curves of Co0.9Ni0.1OOH nanodiscs and nanorings at a sweep rate of 5 mVs−1. (b) Galvanostatic charge/discharge curves of Co0.9Ni0.1OOH nanodiscs and nanorings at discharge current of 1 A g−1. (c) CV curves of M doped Co0.9M0.1OOH (M = Ni, Mn, Fe) nanorings at a sweep rate of 5 mV s−1. (SCE). (d) Galvanostatic charge/discharge curves of M doped Co0.9M0.1OOH (M = Ni,Mn,Fe) nanorings at discharge current of 1 A g−1.