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Sulfur composite was prepared by encapsulating sulfur into CMK-3 mesoporous carbon with different heating times and then used as the cathode material for lithium sulfur batteries. Thermal treatment at 300°C plays an important role in the sulfur encapsulation process. With 20h of heating time, a portion of sulfur remained on the surface of carbon, whereas with 60h of heating time, sulfur is confined...
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