Nickel doped copper ferrite NiCuFeO for a high crystalline anode material for lithium ion batteries

Transition metal oxides (TMO) have great potential applications in efficient energy storage devices for their commercial possibilities in lithium-ion batteries (LIBs). However, they suffer from a limited synthetic route and lack an in-depth designing of ferrite-based electrode materials with improved electrochemical performances. Herein, a co-precipitation technique was applied to synthesize Ni-doped Cu ferrite Ni x Cu 1− x Fe 2 O 4 with different ratios of Ni ( x = 0, 0.1, 0.3, 0.5) as a high performance anode material for LIBs. The resulting Ni x Cu 1− x Fe 2 O 4 of uniform size demonstrated excellent electrochemical performances with a high dimensional stability regardless of 250 cycles at a current rate of 2C. In particular, the Ni x Cu 1− x Fe 2 O 4 hybrid structure combined the advantages of both the Ni and Cu ferrite, which manifested a significant enhancement in the electrochemical performances of LIBs. The crystalline phase, morphology, electrochemical performances and reaction mechanism between Li and the active materials were briefly discussed. Transition metal oxides (TMO) have great potential applications in efficient energy storage devices for their commercial possibilities in lithium-ion batteries (LIBs).