Decorating Lithium Titanium-Phosphate Carbon Layers with Mo₂C as Efficient Li-Ion Storage Electrode

Rapid charging technology is increasingly needed, especially in the case of continuous energy consumption. Na superionic conductor (NASICON)-type materials are considered one of the most attractive candidates for lithium-ion batteries (LIBs) due to their multiple ionic channels and efficient kinetics. LiTi2(PO4)3 as a representative of the NASICON-type has been widely studied because of its own advantages. LiTi2(PO4)3’s own poor electronic conductivity restricts its further development. Herein, Mo2C was used to decorate the external carbon layer of the LiTi2(PO4)3 to alleviate this problem. The excellent conductivity of Mo2C can enhance the concentration of electrons in the carbon layer and improve the Li+/e– conversion efficiency of electrodes. Therefore, the LiTi2(PO4)3/C@Mo2C composites displayed outstanding capacity retention of 86.8% after 4000 cycles under a high current density of 10 C, showing excellent and stable electrochemical performance. This work provides a fungible and convenient route for the hybrid of NASICON-type and carbon-layer materials as high-performance electrodes for Li-ion batteries.