Activated and carbonized metal-organic frameworks for improved cycle performance of cathode material in lithium-sulphur batteries

D. Capkova, M. Almasi, J. Macko, N. Kiraly, O. Cech, P. Cudek, A. Strakova Fedorkova, V. Knap, T. Kazda

Research output: Contribution to journalConference articlepeer-review

Abstract

The development of new battery systems has been intensively pursued in an effort to increase energy densities. Lithium-sulphur batteries represent a group of next-generation batteries with high theoretical capacity and energy density. The electrochemical properties of lithium-sulphur batteries may be improved by the application of appropriate conductive and porous additives to sulphur in the cathode material. Recently, materials belonging to the group of metal-organic frameworks (MOFs) have been widely investigated as host materials for sulphur thanks to their unique porous structure. In this work, various types of MOFs (GaTCPP, MOF-76(Gd), MIL-101(Fe)-NH2) were applied to the cathode material. MOFs were activated or carbonized before cathode material preparation. The structure of activated GaTCPP showed the lowest capacity fading per cycle (0.07 %) from activated MOFs during cycling at 0.5 C for 200 cycles. The carbonization process may improve the electrochemical properties of the electrode material. The best electrochemical properties showed carbonized MOF-76(Gd), and the capacity fading rate per cycle was only 0.04 % despite 200 cycles at 0.5 C.

Original languageEnglish
Article number012010
JournalJournal of Physics: Conference Series
Volume2382
Issue number1
DOIs
Publication statusPublished - 2022
Externally publishedYes
Event23rd International Conference on Advanced Batteries, Accumulators and Fuel Cells, ABAF 2022 - Brno, Czech Republic
Duration: 21 Aug 202224 Aug 2022

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