Fig. 4From: NiCo2S4 Nanocrystals on Nitrogen-Doped Carbon Nanotubes as High-Performance Anode for Lithium-Ion BatteriesXPS spectra of a Co 2p, b N 1s, c S 2p, d Ni 2p, and e C 1s in NiCo2S4/N-CNTBack to article page