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

Published: 26 Jun 2018 | Version 1 | DOI: 10.17632/n2f2gb9m6h.1

Description of this data

A rapid (5-second) sulfur deposition technique is demonstrated on electrospun carbon nanofibers to fabricate binder-free, freestanding cathodes 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. The cathodes thus obtained deliver a discharge capacity of ~ 550 mA h gsulfur-1 owing to their simple construction, with 100% capacity retention at 0.5C rate over 150 cycles. This translates to ~250 mA h gelectrode-1 (based on total mass at the cathode) which is comparable to highly sophisticated electrodes when the weight of the entire electrode and current collector is considered.

Experiment data files

This data is associated with the following publication:

Binder-free, freestanding cathodes fabricated with an ultra-rapid diffusion of sulfur into carbon nanofiber mat for lithiumsulfur batteries

Published in: Materials Today Energy

Latest version

  • Version 1

    2018-06-26

    Published: 2018-06-26

    DOI: 10.17632/n2f2gb9m6h.1

    Cite this dataset

    Kalra, Vibha; Chung, Sheng-Heng; Dillard, Caitlin; Manthiram, Arumugam (2018), “Data for: Binder-free, Freestanding Cathodes Fabricated with an Ultra-rapid Diffusion of Sulfur into Carbon Nanofibers for Lithium-Sulfur Batteries”, Mendeley Data, v1 http://dx.doi.org/10.17632/n2f2gb9m6h.1

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Nanomaterials, Lithium Battery

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