Electrochemical process of sulfur in carbon materials from electrode thickness to interlayer
2019
Abstract Lots of efforts have been done on different porous carbon materials as cathode for Lithium–sulfur (Li–S) battery. However, seldom researches have been done on the relationship between cathode thickness and electrochemical performance. Our work investigates the relation between electrochemical performance and cathode thickness with typical porous carbon materials. We explain the phenomenon that only a modest cathode thickness can have the most adequate electrochemical reaction trend through the aspect of thermodynamics (chemical potential) so that the best electrochemical performance can be obtained. Besides, interlayer can remit the shuttle effect but hinder the lithium ion diffusion process simultaneously. And we verify the effect of interlayer thickness on the shuttle effect and lithium ion diffusion process.
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