@article{Yu2017, 
author = {Huijuan Yu and Hanwen Li and Shouyi Yuan and Yuchi Yang and Jiahui Zheng and Jianhua Hu and Dong Yang and Yonggang Wang and Angang Dong},
title = {Three-dimensionally ordered, ultrathin graphitic-carbon frameworks with cage-like mesoporosity for highly stable Li-S batteries},
year = {2017},
journal = {Nano Research},
volume = {10},
number = {7},
pages = {2495-2507},
keywords = {self-assembly, nanoparticles, Li-S batteries, graphene frameworks, cage-like mesoporosity},
url = {https://www.sciopen.com/article/10.1007/s12274-017-1454-1},
doi = {10.1007/s12274-017-1454-1},
abstract = {Mesoporous carbons have been widely utilized as the sulfur host for lithium-sulfur (Li-S) batteries. The ability to engineer the porosity, wall thickness, and graphitization degree of the carbon host is essential for addressing issues that hamper commercialization of Li-S batteries, such as fast capacity decay and poor high-rate performance. In this work, highly ordered, ultrathin mesoporous graphitic-carbon frameworks (MGFs) having unique cage-like mesoporosity, derived from self-assembled Fe3O4 nanoparticle superlattices, are demonstrated to be an excellent host for encapsulating sulfur. The resulting S@MGFs exhibit high specific capacity (1, 446 mAh·g-1 at 0.15 C), good rate capability (430 mAh·g-1 at 6 C), and exceptional cycling stability (~0.049% capacity decay per cycle at 1 C) when used as Li-S cathodes. The superior electrochemical performance of the S@MGFs is attributed to the many unique and advantageous structural features of MGFs. In addition to the interconnected, ultrathin graphitic-carbon framework that ensures rapid electron and lithium-ion transport, the microporous openings between adjacent mesopores efficiently suppress the diffusion of polysulfides, leading to improved capacity retention even at high current densities.}
}