Binder-free sulfur—carbon nanotube composite cathodes for rechargeable lithium—sulfur batteries and methods of making the same

摘要

The present disclosure includes a sulfur-carbon nanotube composite comprising a sheet of carbon nanotubes and sulfur nucleated upon the carbon nanotubes, and methods for synthesizing the same. In some embodiments, the sulfur-carbon composite may further be binder-free and include a sheet of carbon nanotubes, rendering a binder and a current collector unnecessary. In other embodiments of the present disclosure, a cathode comprising the sulfur-carbon nanotube composite is disclosed. In additional embodiments of the present disclosure, batteries may include the cathodes described herein. Those batteries may achieve high rate capabilities.

主权项

1. A sulfur-carbon nanotube composite comprising:
a sheet of self-assembled, interwoven, multi-walled carbon nanotubes; sulfur nucleated upon the carbon nanotubes in an amount of at least 45 weight % of the composite and configured to reversibly react with an alkali metal to form polysulfides.