High energy density of cathode materials

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High energy density cathode materials; Li2S / S related material

Li-S battery has 4 ~ 5 times higher energy density than commercial LIBs.

Issues and Challenges

1. Low electrical conductivity

2. Large structure change

3. Polysulfide dissolution into electrolyte

Research approaches

Nano-sized Carbon composites Coating
Large surface area Electronic conductivity Structure stability
ACS Appl. Mater. Interfaces, 2015, 7 (38), pp 21479-21486
J. Am. Chem. Soc., 2011, 133 (46), pp 18522-18525
Nature Communications 5, Article number: 5017 (2014)
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