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Insights into a surface-modified Li(Ni0.80Co0.15Al0.05)O2 cathode by atomic layer fluorination for improved cycling behaviour.
- Source :
- Dalton Transactions: An International Journal of Inorganic Chemistry; 5/21/2024, Vol. 53 Issue 19, p8105-8111, 7p
- Publication Year :
- 2024
-
Abstract
- Li(Ni<subscript>0.80</subscript>Co<subscript>0.15</subscript>Al<subscript>0.05</subscript>)O<subscript>2</subscript> is a lithium-ion battery cathode, commercially available for more than twenty years, which is associated with high energy capacity and high energy density, with moderate power. Atomic layer fluorination (ALF) of Li(Ni<subscript>0.80</subscript>Co<subscript>0.15</subscript>Al<subscript>0.05</subscript>)O<subscript>2</subscript> with XeF<subscript>2</subscript> is performed to improve its cyclability. The ALF method aims at forming an efficient protecting fluorinated layer at the surface of the material, with a low fluorine content. Surface fluorinated Li(Ni<subscript>0.80</subscript>Co<subscript>0.15</subscript>Al<subscript>0.05</subscript>)O<subscript>2</subscript> is characterized by X-ray diffraction, electron microscopy, <superscript>19</superscript>F nuclear magnetic resonance, X-ray photoelectron spectroscopy, and galvanostatic measurements, and a fluorine content as low as 1.4 wt% is found. The presence of fluorine atoms improves the electrochemical performances of Li(Ni<subscript>0.80</subscript>Co<subscript>0.15</subscript>Al<subscript>0.05</subscript>)O<subscript>2</subscript>: cyclability, polarization and rate capability are improved. Operando infrared spectroscopy and post-mortem gas chromatography provide some insights into the origins of these improvements. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 14779226
- Volume :
- 53
- Issue :
- 19
- Database :
- Complementary Index
- Journal :
- Dalton Transactions: An International Journal of Inorganic Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 177400791
- Full Text :
- https://doi.org/10.1039/d4dt00600c