434678 Sulfurized Carbon Nanosphere for Superformance Lithium-Sulfur Battery Cathode

Tuesday, November 10, 2015: 2:24 PM
253B (Salt Palace Convention Center)
Shuya Wei, Chemical Engineering, Cornell University, Ithaca, NY and Lynden A. Archer, School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, NY

Sulfurized carbon nanosphere for super performance lithium-sulfur battery cathode


Sulfurized carbon nanospheres derived from polyacrylonitrile provide a promising route towards cathode materials that overcome technical barriers to high-energy, rechargeable lithium-sulfur batteries. By entrapping smaller molecular sulfur species in the nanospheres through covalent bonding to carbon, these materials obviate polysulfide dissolution and shuttling between lithium anode and sulfur cathode. We show that carbonate electrolytes can be applied to avoid lithium polysulfide dissolution and loss of active material from cathode. The electrochemical behavior of the composite suggests a full and reversible reduction and oxidation between elemental sulfur and lithium sulfide, providing directions for rational design of sulfur cathode in lithium-sulfur batteries.

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See more of this Session: Carbon Nanomaterials Graduate Student Award Session
See more of this Group/Topical: Nanoscale Science and Engineering Forum