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MIL-53 Metal–Organic Framework as a flexible cathode for lithium-oxygen batteries
- Source :
- Materials, Materials, MDPI, 2021, 14 (16), pp.4618. ⟨10.3390/ma14164618⟩, Materials, Vol 14, Iss 4618, p 4618 (2021), Materials, 2021, 14 (16), pp.4618. ⟨10.3390/ma14164618⟩, Volume 14, Issue 16
- Publication Year :
- 2021
- Publisher :
- HAL CCSD, 2021.
-
Abstract
- Li-air batteries possess higher specific energies than the current Li-ion batteries. Major drawbacks of the air cathode include the sluggish kinetics of the oxygen reduction (OER), high overpotentials and pore clogging during discharge processes. Metal–Organic Frameworks (MOFs) appear as promising materials because of their high surface areas, tailorable pore sizes and catalytic centers. In this work, we propose to use, for the first time, aluminum terephthalate (well known as MIL-53) as a flexible air cathode for Li-O2 batteries. This compound was synthetized through hydrothermal and microwave-assisted routes, leading to different particle sizes with different aspect ratios. The electrochemical properties of both materials seem to be equivalent. Several behaviors are observed depending on the initial value of the first discharge capacity. When the first discharge capacity is higher, no OER occurs, leading to a fast decrease in the capacity during cycling. The nature and the morphology of the discharge products are investigated using ex situ analysis (XRD, SEM and XPS). For both MIL-53 materials, lithium peroxide Li2O2 is found as the main discharge product. A morphological evolution of the Li2O2 particles occurs upon cycling (stacked thin plates, toroids or pseudo-spheres).
- Subjects :
- Technology
Materials science
lithium-oxygen batteries
chemistry.chemical_element
02 engineering and technology
010402 general chemistry
Electrochemistry
01 natural sciences
Article
Hydrothermal circulation
law.invention
chemistry.chemical_compound
metal–organic frameworks
X-ray photoelectron spectroscopy
law
General Materials Science
Microscopy
QC120-168.85
QH201-278.5
[CHIM.MATE]Chemical Sciences/Material chemistry
Engineering (General). Civil engineering (General)
021001 nanoscience & nanotechnology
Cathode
TK1-9971
0104 chemical sciences
Descriptive and experimental mechanics
chemistry
Chemical engineering
electrochemical performance
Particle
Metal-organic framework
Lithium
Electrical engineering. Electronics. Nuclear engineering
TA1-2040
0210 nano-technology
Lithium peroxide
Subjects
Details
- Language :
- English
- ISSN :
- 19961944
- Database :
- OpenAIRE
- Journal :
- Materials, Materials, MDPI, 2021, 14 (16), pp.4618. ⟨10.3390/ma14164618⟩, Materials, Vol 14, Iss 4618, p 4618 (2021), Materials, 2021, 14 (16), pp.4618. ⟨10.3390/ma14164618⟩, Volume 14, Issue 16
- Accession number :
- edsair.doi.dedup.....42aa2e27f9e84a0255322f2d56292c85