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Catalyzing polysulfide conversion by g-C3N4 in a graphene network for long-life lithium-sulfur batteries
- Source :
- Nano Research. 11:3480-3489
- Publication Year :
- 2018
- Publisher :
- Springer Science and Business Media LLC, 2018.
-
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.
- Subjects :
- Graphene
Graphitic carbon nitride
chemistry.chemical_element
02 engineering and technology
010402 general chemistry
021001 nanoscience & nanotechnology
Condensed Matter Physics
01 natural sciences
Sulfur
Atomic and Molecular Physics, and Optics
0104 chemical sciences
Catalysis
law.invention
chemistry.chemical_compound
chemistry
Chemical engineering
law
General Materials Science
Electrical and Electronic Engineering
0210 nano-technology
Carbon
Dissolution
Polysulfide
Sulfur utilization
Subjects
Details
- ISSN :
- 19980000 and 19980124
- Volume :
- 11
- Database :
- OpenAIRE
- Journal :
- Nano Research
- Accession number :
- edsair.doi...........c2dcafaf8f41cae7dec24b994954b44e