Data for: Binder-free, Freestanding Cathodes Fabricated with an Ultra-rapid Diffusion of Sulfur into Carbon Nanofibers for Lithium-Sulfur Batteries

The 5-second procedure melts sulfur into carbon nanofiber mats, which play a significant role as a built-in conductive matrix to provide uninterrupted electron transport pathways throughout the electrode such that the heavy current collector is eliminated.

Meanwhile, the large inter-fiber spacing facilitates electrolyte diffusion and provides sufficient space for sulfur integration during cathode fabrication and the volume expansion during lithium-sulfur redox reaction. This technique eliminates the need for slurry processing with insulating binders and toxic solvents as well as eliminating heavy current collectors. This ultra-rapid technique involving only 140 °C, 5 s, and slight pressure (< 250 psi) offers a practical approach to light-weight sulfur cathodes compared to the conventional sulfur melt deposition techniques requiring high temperatures (155 - 300 °C), long times (8 - 10 h), and heavy components in the cell assembly.