Figure 3

(a) Raman spectra of the pristine graphene nanosheets, the bare LiNi_0.5Mn_1.5O₄ nanorods and the LiNi_0.5Mn_1.5O₄-graphene composite. (b) Enlargement of the Raman spectrum of the LiNi_0.5Mn_1.5O₄ nanorods in the frequency range between 300 and 700 cm⁻¹.