American Chemical Society
Browse
nn5b01406_si_001.pdf (434.27 kB)

Nanoporous Cathodes for High-Energy Li–S Batteries from Gyroid Block Copolymer Templates

Download (434.27 kB)
journal contribution
posted on 2015-06-23, 00:00 authored by Soumyadip Choudhury, Mukesh Agrawal, Petr Formanek, Dieter Jehnichen, Dieter Fischer, Beate Krause, Victoria Albrecht, Manfred Stamm, Leonid Ionov
This study reports on a facile approach to the fabrication of nanoporous carbon cathodes for lithium sulfur batteries using gyroid carbon replicas based on use of polystyrene-poly-4-vinylpyridine (PS-P4VP) block copolymers as sacrificial templates. The free-standing gyroid carbon network with a highly ordered and interconnected porous structure has been fabricated by impregnating the carbon precursor solution into the gyroid block copolymer nanotemplates and subsequently carbonizing them. A wide range of analytical tools have been employed to characterize fabricated porous carbon material. Prepared nanostructures are envisioned to have a great potential in myriad areas such as energy storage/conversion devices owing to their fascinating morphology exhibiting high surface area and uniform porosity with interconnected three-dimensional networks. The resulting carbon nanoporous structures infused with elemental sulfur have been found to work as a promising electrode for lithium sulfur batteries demonstrating a high cycling stability over more than 200 cycles.

History