CoMoO4/Fe2O3 core-shell nanorods with high lithium-storage performance as the anode of lithium-ion battery

• New material. CoMoO4/Fe2O3 core-shell nanorods are firstly synthesized.
• High performance. Both the capacity and cyclability are very high.
• New mechanism. The mechanism is based on the complex synergistic effect.
• Potential application. The nanocomposites are promising candidates for Li battery.

CoMoO4/Fe2O3 core-shell nanorods are synthesized by a two-step hydrothermal method, and Fe2O3 nanoparticles as shell are uniformly distributed on the whole surface of CoMoO4 nanorods. The core-shell nanorods as the anode of lithium-ion battery exhibit high reversible capacity of 1354 mAh g−1 at 0.2 C rate (5 h per half cycle), which is higher than that of bare CoMoO4 nanorods. The discharge capacity can still maintain at 1335 mAh g−1 (after 50 cycles) and 1236 mAh g−1 (after 100 cycles). The capacity retention between 2nd and 50th cycles is up to 98.6%. The superior lithium-storage performance can be owned to the stable crystal structure, good electrical conductivity and complex synergistic effect between CoMoO4 and Fe2O3. The present results indicate that CoMoO4/Fe2O3 core-shell nanorods are promising candidates for the anode of lithium-ion battery.

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