Three-in-One Multi-Level Design of MoS2-Based Anodes for Enhanced Sodium Storage: from Atomic to Macroscopic Level

Constructing sodium-ion battery anodes with efficient ion/electron transport and high cycling stability is significantly promising for applications but still remains challenging. Here, three-in-one multi-level design is performed to develop a carbon-coated phosphorous-doped MoS2 anchored on carbon nanotube paper (P-MoS2@C/CNTP). The Na+ diffusion and electron transport, as well as the structural stability of the whole anode are simultaneously enhanced through the synergistically optimization of P-MoS2@C/CNTP at atomic, nanoscopic, and macroscopic levels. Resulted from the multi-level modification, the synergetic mechanism has been demonstrated by electrochemical measurement and theoretical calculation. As a result, the free-standing P-MoS2@C/CNTP anode presents a high rate performance (150 mA h g(-1) at 5 A g(-1)) and a long cycling life (1 A g(-1), 1200 cycles, 249 mA h g(-1)). This work provides a new approach to the design and fabrication of high-performance conversion-type electrode materials for rechargeable batteries application.

Automated summary

A three-in-one multi-level design was used to develop a carbon-coated phosphorous-doped MoS2 anchored on carbon nanotube paper (P-MoS2@C/CNTP) for sodium-ion battery anodes. The optimized structure enhances Na+ diffusion, electron transport, and overall stability. The synergistic mechanism was demonstrated through electrochemical measurements and theoretical calculations, showing high rate performance and long cycling life for the P-MoS2@C/CNTP anode.