Effects of Nitrogen-Doping or Alumina Films on Graphene as Anode Materials of Lithium-Ion Batteries Verified by In Situ XRD

Figure 5

The discharge/charge profiles (between 0.01 V and 3 V at 0.1 C) with different charge-discharge cycles of the coin cell for (a) graphene, (b) N-doped graphene, and (c) Al₂O₃/graphene.

(a)

(b)

(c)