期刊
CHEMICAL ENGINEERING JOURNAL
卷 333, 期 -, 页码 185-190出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2017.09.134
关键词
Lithium-sulfur battery; Porous carbon nanofiber-sulfur composite; Micro-mesoporous; Meso-macroporous
资金
- National Natural Science Foundation of China [51678411, 51673148]
- Science and Technology Plans of Tianjin [16PTSYJC00110, 15PTSYJC00230, 16JCTPJC45600]
The porous carbon nanofibers-sulfur (PCNFs-S) composite electrode with micro-mesoporous (<10 nm) and meso-macroporous (>10 nm) is successfully designed and prepared via the electro-blown spinning technique and thermal treatment. The meso-macroporous structure in the PCNFs-S composite can provide high sulfur content up to 80 wt%, while micro-mesoporous affords efficient trapping of polysulfides and inhibits the shuttle effect. And the tailored porous fibrous network structure and carbon nanotubes (CNTs) in the composite facilitate the construction of a high electrical conductive pathway. Therefore, the lithium-sulfur (Li-S) batteries electrode exhibits high initial discharge capacities as high as 954 and 602.2 mAh g(-1) at 0.5 C and 2 C, respectively, and can obtain quite stable capacities of 795 and 601.5 mAh g(-1) after 350 cycles.
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