Synergistically Designed Dual Interfaces to Enhance the Electrochemical Performance of MoO2/MoS2 in Na- and Li-Ion Batteries

It is indispensable to develop and design high capacity, high rate performance, long cycling life, and low-cost electrodes materials for lithium-ion batteries (LIBs) and sodium-ion batteries (SIBs). Herein, MoO2/MoS2/C, with dual heterogeneous interfaces, is designed to induce a built-in electric field, which has been proved by experiments and theoretical calculation can accelerate electrochemical reaction kinetics and generate interfacial interactions to strengthen structural stability. The carbon foam serves as a conductive frame to assist the movement of electrons/ions, as well as forms heterogeneous interfaces with MoO2/MoS2 through C-S and C-O bonds, maintaining structural integrity and enhancing electronic transport. Thanks to these unique characteristics, the MoO2/MoS2/C renders a significantly enhanced electrochemical performance (324 mAh g(-1) at 1 A g(-1) after 1000 cycles for SIB and 500 mAh g(-1) at 1 A g(-1) after 500 cycles for LIBs). The current work presents a simple, useful and cost-effective route to design high-quality electrodes via interfacial engineering.

Automated summary

In this study, a MoO2/MoS2/C material with dual heterogeneous interfaces is designed to enhance electrochemical performance for LIBs and SIBs. The combination of MoO2/MoS2 and carbon foam provides improved structural stability and electronic transport. The results show significantly enhanced electrochemical performance for both SIBs and LIBs.