@article{Wang2018, 
author = {Meng Wang and Qinghua Liang and Junwei Han and Ying Tao and Donghai Liu and Chen Zhang and Wei Lv and Quan-Hong Yang},
title = {Catalyzing polysulfide conversion by g-C3N4 in a graphene network for long-life lithium-sulfur batteries},
year = {2018},
journal = {Nano Research},
volume = {11},
number = {6},
pages = {3480-3489},
keywords = {graphene, lithium-sulfur batteries, lithium polysulfide, graphitic carbon nitride (g-C3N4), catalytic conversion},
url = {https://www.sciopen.com/article/10.1007/s12274-018-2023-y},
doi = {10.1007/s12274-018-2023-y},
abstract = {The practical application of lithium-sulfur batteries with a high energy density has been plagued by the poor cycling stability of the sulfur cathode, which is a result of the insulating nature of sulfur and the dissolution of polysulfides. Much work has been done to construct nanostructured or doped carbon as a porous or polar host for promising sulfur cathodes, although restricting the polysulfide shuttle effect by improving the redox reaction kinetics is more attractive. Herein, we present a well-designed strategy by introducing graphitic carbon nitride (g-C3N4) into a three-dimensional hierarchical porous graphene assembly to achieve a synergistic combination of confinement and catalyzation of polysulfides. The porous g-C3N4 nanosheets in situ formed inside the graphene network afford a highly accessible surface to catalyze the transformation of polysulfides, and the hierarchical porous graphene-assembled carbon can function as a conductive network and provide appropriate space for g-C3N4 catalysis in the sulfur cathode. Thus, this hybrid can effectively improve sulfur utilization and block the dissolution of polysulfides, achieving excellent cycling performance for sulfur cathodes in lithium-sulfur batteries.}
}