新型炭材料2021，Vol.36Issue(6)：1094-1102,9.DOI:10.1016/S1872-5805(21)60063-X
三维多级孔炭封装硫制备在室温环境运行的锂硫电池
High performance lithium-sulfur batteries using three-dimensional hierarchical porous carbons to host the sulfur
摘要
Abstract
Lithium-sulfur batteries are promising for future energy storage because of their high-energy density and low price. However, they have many problems, especially the large volume change during cycling and the shuttle effect of the soluble polysulf-ides. To solve these problems, a three-dimensional porous carbon (3D-HPC) was investigated as the sulfur host of a lithium-sulfur battery. The 3D-HPC was prepared by a template method using polymethyl methacrylate and zinc oxide as the templates to form mesopores and macropores, respectively. The results showed that the interconnected macroporous channels and abundant large meso-pores formed a three-dimensional conductive carbon network which is beneficial for electron/ion transfer and relieves the cathode volume change by the physical limiting effect. The pores alleviate the shuttle effect by the capillary condensation. A 3D-HPC-S com-posite used as the cathode has excellent electrochemical properties. The first discharge specific capacity of the 3D-HPC-S is 1314.6 mAh g?1 at 0.2 C with a sulfur loading of 70％. After 100 cycles, the capacity retention rate is 69.13％. At 0.5 C, the capacity retention rate after 200 cycles is 59.02％ and the average coulombic efficiency is 98.16％.关键词
三维结构/多级多孔炭/大孔/锂硫电池Key words
Three-dimensionally structure/Hierarchical porous carbon/Macropore/Lithium-sulfur battery分类
化学化工引用本文复制引用
单宇航,李丽波,杜金田,翟墨..三维多级孔炭封装硫制备在室温环境运行的锂硫电池[J].新型炭材料,2021,36(6):1094-1102,9.基金项目
国家自然科学基金项目(No.21706043).This work was supported financially by the Na-tional Natural Science Foundation of China(No.21706043). （No.21706043）
