Dual-carbon-constrained sulfur-doped MoSe2 composite as high-performance self-supporting anodes for sodium-ion batteries

Developing anode materials that simultaneously delivered high capacity, excellent rate capability, and long-term cycling stability remained a formidable challenge for sodium-ion batteries. In this work, a self-supporting composite anode (dual-carbon confinement architecture) was synthesized via a one-step glucose-assisted hydrothermal method. The dual-carbon-confinement architecture and partial substitution of selenium by sulfur effectively expanded the interlayer spacing and induced interfacial defects, created abundant active sites to facilitated reversible Na + intercalation/deintercalation. Benefiting from the synergistic effect of sulfur doping and the interconnected carbon network, the electrode delivered a reversible capacity of 500 mAh g −1 at 0.1 A g −1 and maintained 300 mAh g −1 after 600 cycles at 0.3 A g −1 , exhibiting excellent structural stability and electrochemical durability. This study offered a promising strategy for the rational design and scalable synthesis of high-performance composite anode materials for next-generation sodium-ion storage systems. Section Graphical