AI Article Synopsis
- - Li(NiCoAl)O is a long-time lithium-ion battery cathode known for its high energy capacity and density but moderate power, making it a reliable choice for energy storage.
- - Atomic layer fluorination (ALF) with XeF is used to enhance the battery's cyclability by creating a protective fluorinated layer with minimal fluorine content (only 1.4 wt%).
- - Various characterization techniques show that adding fluorine improves the electrochemical performance of Li(NiCoAl)O, enhancing its cyclability, polarization, and rate capability, with further insights into these benefits obtained from infrared spectroscopy and gas chromatography.
Article Abstract
Li(NiCoAl)O 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(NiCoAl)O with XeF 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(NiCoAl)O is characterized by X-ray diffraction, electron microscopy, 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(NiCoAl)O: cyclability, polarization and rate capability are improved. infrared spectroscopy and gas chromatography provide some insights into the origins of these improvements.
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| http://dx.doi.org/10.1039/d4dt00600c | DOI Listing |
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