N-doped yolk-shell hollow carbon sphere wrapped with graphene as sulfur host for high-performance lithium-sulfur batteries
N-doped yolk-shell hollow carbon sphere wrapped with graphene as sulfur host for high-performance lithium-sulfur batteries
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DOI：
10.1016/j.apsusc.2017.06.288
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发表时间：
2018
影响因子：
6.7
通讯作者：
Yongzheng Zhang;Kai Sun;Zhang Liang;Yanli Wang;Licheng Ling
中科院分区：
文献类型：
--
作者：
Yongzheng Zhang;Kai Sun;Zhang Liang;Yanli Wang;Licheng Ling
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 g−1at 0.2 C after 100 cycles) and good high-rate capability (636 mAh g−1at 1 C and 540 mAh g−1at 2 C).
