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A robust, modular approach to produce graphene-MOx multilayer foams as electrodes for Li-ion batteries
- Source :
- Nanoscale, 11 (2019): 5265–5273. doi:10.1039/c8nr09195a, info:cnr-pdr/source/autori:Xia, Zhen Yuan; Christian, Meganne; Arbizzani, Catia; Morandi, Vittorio; Gazzano, Massimo; Quintano, Vanesa; Kovtun, Alessandro; Palermo, Vincenzo/titolo:A robust, modular approach to produce graphene-MOx multilayer foams as electrodes for Li-ion batteries/doi:10.1039%2Fc8nr09195a/rivista:Nanoscale (Print)/anno:2019/pagina_da:5265/pagina_a:5273/intervallo_pagine:5265–5273/volume:11
- Publication Year :
- 2019
- Publisher :
- RSC Publishing, Cambridge , Regno Unito, 2019.
-
Abstract
- Major breakthroughs in batteries would require the development of new composite electrode materials, with a precisely controlled nanoscale architecture. However, composites used for energy storage are typically a disordered bulk mixture of different materials, or simple coatings of one material onto another. We demonstrate here a new technique to create complex hierarchical electrodes made of multilayers of vertically aligned nanowalls of hematite (Fe2O3) alternated with horizontal spacers of reduced graphene oxide (RGO), all deposited on a 3D, conductive graphene foam. The RGO nanosheets act as porous spacers, current collectors and protection against delamination of the hematite. The multilayer composite, formed by up to 7 different layers, can be used with no further processing as an anode in Li-ion batteries, with a specific capacity of up to 1175 A h cm(-2) and a capacity retention of 84% after 1000 cycles. Our coating strategy gives improved cyclability and rate capacity compared to conventional bulk materials. Our production method is ideally suited to assemble an arbitrary number of organic-inorganic materials in an arbitrary number of layers.
- Subjects :
- Materials science
Composite number
Oxide
Nanotechnology
02 engineering and technology
engineering.material
010402 general chemistry
7. Clean energy
01 natural sciences
law.invention
chemistry.chemical_compound
Coating
law
General Materials Science
Fe2O3, graphene nanosheets, RGO, battery electrode
Graphene
Delamination
Graphene foam
graphene
021001 nanoscience & nanotechnology
0104 chemical sciences
Anode
chemistry
Electrode
engineering
0210 nano-technology
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Nanoscale, 11 (2019): 5265–5273. doi:10.1039/c8nr09195a, info:cnr-pdr/source/autori:Xia, Zhen Yuan; Christian, Meganne; Arbizzani, Catia; Morandi, Vittorio; Gazzano, Massimo; Quintano, Vanesa; Kovtun, Alessandro; Palermo, Vincenzo/titolo:A robust, modular approach to produce graphene-MOx multilayer foams as electrodes for Li-ion batteries/doi:10.1039%2Fc8nr09195a/rivista:Nanoscale (Print)/anno:2019/pagina_da:5265/pagina_a:5273/intervallo_pagine:5265–5273/volume:11
- Accession number :
- edsair.doi.dedup.....29f504879bea6338b853286eb9990905