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Caging tin oxide in three-dimensional graphene networks for superior volumetric lithium storage
- Source :
- Nature Communications, Vol 9, Iss 1, Pp 1-9 (2018), Nature Communications
- Publication Year :
- 2018
- Publisher :
- Nature Portfolio, 2018.
-
Abstract
- Tin and its compounds hold promise for the development of high-capacity anode materials that could replace graphitic carbon used in current lithium-ion batteries. However, the introduced porosity in current electrode designs to buffer the volume changes of active materials during cycling does not afford high volumetric performance. Here, we show a strategy leveraging a sulfur sacrificial agent for controlled utility of void space in a tin oxide/graphene composite anode. In a typical synthesis using the capillary drying of graphene hydrogels, sulfur is employed with hard tin oxide nanoparticles inside the contraction hydrogels. The resultant graphene-caged tin oxide delivers an ultrahigh volumetric capacity of 2123 mAh cm–3 together with good cycling stability. Our results suggest not only a conversion-type composite anode that allows for good electrochemical characteristics, but also a general synthetic means to engineering the packing density of graphene nanosheets for high energy storage capabilities in small volumes.<br />The excessive porous space in carbon anodes for lithium-ion batteries has to be utilized for high volumetric performance. Here the authors show an adaptable sulfur template strategy to yield graphene-caged noncarbon materials with a precisely controlled amount of void, enabling ultrahigh volumetric lithium storage.
- Subjects :
- Materials science
Science
Composite number
General Physics and Astronomy
chemistry.chemical_element
Nanoparticle
02 engineering and technology
010402 general chemistry
01 natural sciences
General Biochemistry, Genetics and Molecular Biology
Lithium-ion battery
Article
law.invention
law
Porosity
lcsh:Science
Multidisciplinary
Graphene
General Chemistry
021001 nanoscience & nanotechnology
Tin oxide
0104 chemical sciences
Anode
chemistry
Chemical engineering
lcsh:Q
0210 nano-technology
Tin
Subjects
Details
- Language :
- English
- ISSN :
- 20411723
- Volume :
- 9
- Issue :
- 1
- Database :
- OpenAIRE
- Journal :
- Nature Communications
- Accession number :
- edsair.doi.dedup.....933a2112943c78a4d54ad72a68247534