Graphene/Sulfur/Carbon Nanocomposite for High Performance Lithium-Sulfur Batteries
AbstractHere, we report a two-step synthesis of graphene/sulfur/carbon ternary composite with a multilayer structure. In this composite, ultrathin S layers are uniformly deposited on graphene nanosheets and covered by a thin layer of amorphous carbon derived from β-cyclodextrin on the surface. Such a unique microstructure, not only improves the electrical conductivity of sulfur, but also effectively inhibits the dissolution of polysulfides during charging/discharging processes. As a result, this ternary nanocomposite exhibits excellent electrochemical performance. It can deliver a high initial discharge and charge capacity of 1410 mAh·g−1 and 1370 mAh·g−1, respectively, and a capacity retention of 63.8% can be achieved after 100 cycles at 0.1 C (1 C = 1675 mA·g−1). A relatively high specific capacity of 450 mAh·g−1 can still be retained after 200 cycles at a high rate of 2 C. The synthesis process introduced here is simple and broadly applicable to the modification of sulfur cathode for better electrochemical performance. View Full-Text
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Jin, K.; Zhou, X.; Liu, Z. Graphene/Sulfur/Carbon Nanocomposite for High Performance Lithium-Sulfur Batteries. Nanomaterials 2015, 5, 1481-1492.
Jin K, Zhou X, Liu Z. Graphene/Sulfur/Carbon Nanocomposite for High Performance Lithium-Sulfur Batteries. Nanomaterials. 2015; 5(3):1481-1492.Chicago/Turabian Style
Jin, Kangke; Zhou, Xufeng; Liu, Zhaoping. 2015. "Graphene/Sulfur/Carbon Nanocomposite for High Performance Lithium-Sulfur Batteries." Nanomaterials 5, no. 3: 1481-1492.