Construction of WS2/NC@C nanoflake composites as performance-enhanced anodes for sodium-ion batteries

WS 2 nanoflakes were immobilized on N-doped carbon with abundant active sites, which showed a capacity of 219.6 mA h g −1 at 5 A g −1 after 1000 cycles in SIBs, and a capacity retention of 82.9% at 1 A g −1 after 2000 cycles in SIHCs.