Application of two-dimensional layered Mo-MOF@ppy with high valency molybdenum in lithium-ion batteries

This work demonstrates a facile synthesis of 2D layered Mo-MOF@ppy via reflux heating and coating methods as anode materials in the lithium-ion batteries (LIBs). Mo-MOF with two-dimensional layered structure can accelerate the transfer of electrons inside the whole composite. Mo-MOF, as a precursor in the electrochemical reaction process, provides high-valence Mo binding more Li+, resulting in excellent electrochemical performance of the Mo-MOF. Meanwhile, the coated conducting polymer polypyrrole (ppy) can promote electron transfer and enhance the conductivity of the composite materials. Combining those merits, Mo-MOF@ppy has a better electrochemical performance than pure Mo-MOF. Mo-MOF@ppy can reach 930 mAh g(-1) at a current density of 100 mA g(-1) and maintain 750 mAh g(-1) at a current density of 500 mA g(-1) after 200 cycles. The results show that Mo-MOF@ppy is a promising new anode material for LIBs.

Automated summary

This study demonstrates a facile synthesis of 2D layered Mo-MOF@ppy as anode materials in LIBs, showing excellent electrochemical performance of the Mo-MOF structure. Mo-MOF@ppy maintains a high specific capacity even after cycling at high current densities.