Recently, the expansion of energy consumption of high technology devices and the requirement of nature-friendly energy sources make a necessity of new conceptual energy source. Notably, among various approaches for new energy sources, electrochemical energy storage system seems appealing for its high efficiency and low product of pollutant. Lithium-sulfur secondary battery is one of the most promising electrochemical system for storage chemical energy directly to electrical energy. Although a plenty of research has been conducted in this field, several issues remain, including the irreversible loss of polysulfides and low electrical conductivity.

In this talk, carbonaceous materials are carefully introduced for analyzing electrochemical performance in lithium sulfur battery; not only increasing electrical conductivity for fast kinetics and but also anchoring soluble polysulfides for reversible redox reactions. In addition, the carbon-sulfur bonds originated from oxygen functional groups and polymeric sulfides shows that can support the effective polysulfides affinity with carbon, those effects are proved from various advanced measurements and electrochemical analyses based on theoretical model. These considerations can support tailoring cathode design to solving limitations in lithium-sulfur battery field.