Figure 2

Electrochemical properties: (a) Initial charge-discharge curves of pure mSi, pure GNG and mSi@GNG anode with 50% Si at 0.1 A g⁻¹ (insets are the enlarged discharge curves of each electrode). (b) The initial coulombic efficiency of Si and graphene composite reported recently compared to mSi@GNG composite film electrode. (c) Cycling performance of discharge capacity and coulombic efficiency of the mSi@GNG composite film electrodes and pure mSi electrode at 500 mA g⁻¹. (d) CV curves of the 1^st and 2^nd cycles of the mSi@GNG composite and pure mSi electrode. (e) The 1^st and 2^nd charge–discharge curves at 0.1 A g⁻¹ for mSi@GNG composite. (f) Nyquist plots of pure mSi and mSi@GNG electrodes.