Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5346849 | Applied Surface Science | 2018 | 7 Pages |
â¢Porous N-doped yolk-shell hollow carbon sphere (N-YSHCS) was synthesized.â¢Graphene was further wrapped on the surface of N-YSHCS (rGO/N-YSHCS).â¢The shuttle effect of polysulfides can be suppressed effectively by the unique microstructures.â¢The synthesized rGO/N-YSHCS/S electrode exhibits a high reversible capacity of 800 mAh gâ1 at 0.2 C after 100 cycles.â¢The rGO/N-YSHCS/S electrode shows good high-rate performance (636 mAh gâ1 at 1 C and 540 mAh gâ1 at 2 C).
N-doped yolk-shell hollow carbon sphere wrapped with reduced graphene oxide (rGO/N-YSHCS) is designed and fabricated as sulfur host for lithium-sulfur batteries. The shuttle effect of polysulfides can be suppressed effectively by the porous yolk-shell structure, graphene layer and N-doping. A good conductivity network is provided for electron transportation through the graphene layer coupled with the unique yolk-shell carbon matrix. Such unique structure offers the synthesized rGO/N-YSHCS/S electrode with a high reversible capacity (800 mAh gâ1 at 0.2 C after 100 cycles) and good high-rate capability (636 mAh gâ1 at 1 C and 540 mAh gâ1 at 2 C).
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