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Li2S@C composite incorporated into 3D reduced graphene oxide as a cathode material for lithium-sulfur batteries
Li2S@C composite incorporated into 3D reduced graphene oxide as a cathode material for lithium-sulfur batteries
- Source :
- Journal of Power Sources. 313:233-239
- Publication Year :
- 2016
- Publisher :
- Elsevier BV, 2016.
-
Abstract
- Surface conductive engineering on Li 2 S is critical for construction of advanced cathodes of lithium-sulfur batteries. Herein, we construct a high-performance Li 2 S-based composite cathode with the help of three-dimensional reduced graphene oxide (3D-rGO) network and outer carbon coating. Typically, the Li 2 S@C particles are uniformly embedded into 3D-rGO to form a binder-free 3D-rGO-Li 2 S@C cathode by the combination of a liquid solution-evaporation coating and PVP (Polyvinyl Pyrrolidone) carbonization. The 3D-rGO-Li 2 S@C cathode exhibits a high initial discharge capacity of 856 mAh g −1 at 0.1C, superior cycling stability with a capacity of 388.4 mAh g −1 after 200 cycles at 1C, corresponding to a low capacity fading rate. It is demonstrated that the outer conductive coating is effective and necessary for electrochemical enhancement of Li 2 S cathodes by improving electrical conductivity and prohibiting polysulfide from shuttling during cycling.
- Subjects :
- Materials science
Composite number
Inorganic chemistry
Oxide
Energy Engineering and Power Technology
02 engineering and technology
engineering.material
010402 general chemistry
Electrochemistry
01 natural sciences
law.invention
chemistry.chemical_compound
Coating
Lithium sulfide
law
Electrical and Electronic Engineering
Physical and Theoretical Chemistry
Renewable Energy, Sustainability and the Environment
Carbonization
Graphene
021001 nanoscience & nanotechnology
Cathode
0104 chemical sciences
chemistry
Chemical engineering
engineering
0210 nano-technology
Subjects
Details
- ISSN :
- 03787753
- Volume :
- 313
- Database :
- OpenAIRE
- Journal :
- Journal of Power Sources
- Accession number :
- edsair.doi...........04ca4251f0d62982e2edae917f2cf061
- Full Text :
- https://doi.org/10.1016/j.jpowsour.2016.03.001