Carbon Airgel-Based Cathode for Lithium-Sulfur Batteries

摘要

Nanoporous carbon-based scaffolds or structures, and in particular carbon aerogels and their preparation and use. Embodiments include a sulfur-doped cathode material in a lithium-sulfur cell, wherein the cathode is current collector-free and is formed of a binder-free, monolithic, polyimide-derived carbon airgel. Carbon aerogels contain pores that accommodate the expansion of sulfur during the conversion of elemental sulfur to encircling lithium sulfide. The cathode and primary carbon aerogels provide optimal properties for use in lithium-sulfur cells.