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Abstract
A novel 3D multi-level porous carbon is obtained via a simple facile sugar-blowing method. The multi-level porous carbon sreves as the sulfur host and prepares multi-level porous carbon/sulfur cathode, which exhibited high initial discharge capacity of 1200 mAh g−1 at 0.1 C. After 200 cycles at 0.2 C, the multi-level porous carbon/sulfur cathode remained retentive capacity of 80%. These excellent electrochemical performance can be attributed to the abundant interconnected multi-level porous carbon, providing spacious channels for the transportation of electrons and lithium ions. In addition, multi-level porous carbon prevent the shuttling of polysulfides in charge and discharge process.
Additional information
Funding
This work was financially supported by the National Natural Science Foundation of China (Grant No. 11264023).