Facile Synthesis of Nb-Doped CoTiO3 Hexagonal Microprisms as Promising Anode Materials for Lithium-Ion Batteries

Bimetallic oxides are demonstrated to show better electrochemical performance than single transition metal oxides. Recently, ilmenite-type titanate (MTiO3, M = Fe, Co, Ni, etc.) is emerging as a promising anode for lithium-ion batteries (LIBs) due its comparable theoretical capacity and small volumetric change during cycling. However, the practical still harmed by poor electronic conductivity. Herein, first time, Nb-doping strategy adopted modify CoTiO3 hexagonal microprisms facile solvothermal method combined with an annealing treatment. Benefiting from unique 1D morphology ameliorated conductivities induced Nb-doping, optimized Nb-doped exhibits improved lithium-storage of 233 mA h g−1 at 100 after cycles excellent rate capability, which superior that pure CoTiO3. This work sheds light on potential application titanium containing bimetallic oxide in next-generation advanced rechargeable LIBs.