Authors Choudhury, S. ; Fischer, D. ; Formanek, P. ; Simon, F. ; Stamm, M. ; Ionov, L.
Title Porous carbon prepared from polyacrylonitrile for lithium-sulfur battery cathodes using phase inversion technique
Date 29.08.2018
Number 55586
Abstract In this paper, a time and resource efficient way of preparing porous carbon cathode for lithium-sulfur batteries with superior cycle stability has been demonstrated. In this simple work, we used commercially available polymer as carbon source and non-solvent mixture as porogen or pore former. The cathode has been fabricated by using polyacrylonitrile as base polymer via phase inversion route. By this technique, a highly porous substrate material is generated by dipping a semi-gelled film of polyacrylonitrile in non-solvent mixture. After oxidative crosslinking followed by pyrolysis under inert atmosphere results a highly porous nitrogen doped carbon material, which was further hybridized with sulfur via melt diffusion of elemental sulfur. This cathode material shows although relatively low specific capacity (Cycle 1: ca. 1050·mA·h/gsulfur, cycle 500: ca. 400·mA·h/gsulfur), but excellent cycle stability over 500 charging-discharging cycles is displayed.
Publisher Polymer
Citation Polymer 151 (2018) 171-178
Tags porous carbon polyacrylonitrile cathode phase inversion lithium-sulfur batteries

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