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Crepe Cake Structured Layered Double Hydroxide/Sulfur/Graphene as a Positive Electrode Material for Li-S Batteries
- Source :
- ACS nano. 14(7)
- Publication Year :
- 2020
-
Abstract
- This work was financially supported by National Natural Science Foundation of China (Nos. 21975030 and 11674005), and the Ministry of Science and Technology of China (No. 2016YFB0700600 (National Materials Genome Project)). Solving the polysulfide shuttle problem is one of the core challenges for the industrialization of lithium–sulfur batteries. In this work, a triphasic composite of LDH/sulfur/rGO (LDH: layered double hydroxide, rGO: reduced graphene oxide) with a crepe cake like structure is designed and fabricated as a positive electrode material for lithium–sulfur batteries. Sulfur nanoparticles are embedded in the interlayer space of the composite and thus are well protected physically via three-dimensional wrapping and chemically via strong interaction of LDH nanoflakes with lithium polysulfides, such as ionic bonds and S···H hydrogen bonds. In addition, the flexible lamellar structure of the composite with soft graphene layers can tolerate the volume expansion of sulfur during lithiation as well as facilitate ionic permeability and electron transport, which is favorable for the redox reactions of polysulfide. The present work sheds light on the future development and industrialization of lithium–sulfur batteries. Postprint
- Subjects :
- Materials science
Composite number
Oxide
NDAS
General Physics and Astronomy
chemistry.chemical_element
Ionic bonding
Crepe cake structure
02 engineering and technology
Lithium-sulfur batteries
010402 general chemistry
01 natural sciences
law.invention
chemistry.chemical_compound
law
General Materials Science
QD
Polysulfide
Graphene
General Engineering
021001 nanoscience & nanotechnology
QD Chemistry
Sulfur
0104 chemical sciences
chemistry
Chemical engineering
Layered double hydroxide
Hydroxide
Lithium
0210 nano-technology
Subjects
Details
- ISSN :
- 1936086X
- Volume :
- 14
- Issue :
- 7
- Database :
- OpenAIRE
- Journal :
- ACS nano
- Accession number :
- edsair.doi.dedup.....63af45b15ddcb92bb3a4673a83c47dff