Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/44510
Title: Improving Lithium-Ion Battery Performance: Nano Al2O3 Coatings on High-Mass Loading LiFePO4 Cathodes via Atomic Layer Deposition
Authors: SALIMI NADEM, Pejman 
Gottardi, Gloria
Morais, William G.
Bartali, Ruben
Laidani, Nadhira
Macchi, Edoardo Gino
Issue Date: 2024
Publisher: MDPI
Source: Batteries-basel, 10 (9) (Art N° 304)
Abstract: Lithium iron phosphate (LiFePO4 or LFP) is a promising cathode material for lithium-ion batteries (L; Bs), but side reactions between the electrolyte and the LFP electrode can degrade battery performance. This study introduces an innovative coating strategy, using atomic layer deposition (ALD) to apply a thin (5 nm and 10 nm) Al2O3 layer onto high-mass loading LFP electrodes. Galvanostatic charge-discharge cycling and electrochemical impedance spectroscopy (EIS) were used to assess the electrochemical performance of coated and uncoated LFP electrodes. The results show that Al2O3 coatings enhance the cycling performance at room temperature (RT) and 40 degrees C by suppressing side reactions and stabilizing the cathode-electrolyte interface (CEI). The coated LFP retained 67% of its capacity after 100 cycles at 1C and RT, compared to 57% for the uncoated sample. Post-mortem analyses, including scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS), were conducted to investigate the mechanisms behind the improved performance. These analyses reveal that Al2O3 coatings are highly effective in reducing LFP electrode degradation during cycling, demonstrating the potential of ALD Al2O3 coatings to enhance the durability and performance of LFP electrodes in LIBs.
Notes: Salimi, P; Macchi, EG (corresponding author), Fdn Bruno Kessler, Ctr Sustainable Energy, Via Sommar 18, I-38123 Trento, Italy.; Salimi, P (corresponding author), Hasselt Univ, Inst Mat Res imo imomec, Martelarenlaan 42, Hasselt, Belgium.
pejman.salimi@uhasselt.be; emacchi@fbk.eu
Keywords: lithium-ion batteries;LiFePO4;atomic layer deposition;cycling improvement;XPS analysis
Document URI: http://hdl.handle.net/1942/44510
e-ISSN: 2313-0105
DOI: 10.3390/batteries10090304
ISI #: 001327242000001
Rights: 2024 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// creativecommons.org/licenses/by/ 4.0/).
Category: A1
Type: Journal Contribution
Appears in Collections:Research publications

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