| Title: |
Advanced Molecular Layer Deposition of Si x Zn y O z Thin Film Coatings for Improved Electrochemical Performance of NMC811 |
| Authors: |
Akella, Sri Harsha; Mukherjee, Ayan; Lidor‐Shalev, Ortal; Bashkurov, Roman; Wang, Yang; Buchine, Isaac; Wang, Longlong; Zysler, Melina; Ejgenberg, Michal; Kravchuk, Tatyana; Kozen, Alexander C.; Bravo‐Zhivotovskii, Dmitry; Apeloig, Yitzhak; Lee, Sang Bok; Fan, Xiulin; Leskes, Michal; Noked, Malachi |
| Contributors: |
Israel Science Foundation |
| Source: |
Batteries & Supercaps ; volume 7, issue 11 ; ISSN 2566-6223 2566-6223 |
| Publisher Information: |
Wiley |
| Publication Year: |
2024 |
| Collection: |
Wiley Online Library (Open Access Articles via Crossref) |
| Description: |
The practical realization of Nickel‐rich layered oxide cathode materials such as LiNi 0.8 Mn 0.1 Co 0.1 O 2 (NMC811) is hampered by several structural and interfacial instabilities over prolonged cycling. Several reports have proposed surface passivation via an artificial cathode electrolyte interphase (ACEI) as a promising method for mitigating the parasitic reactions affecting NMC811 while simultaneously improving its electrochemical performance over prolonged cycling. Herein, we report an in‐house designed (tBuMe 2 Si) 2 Zn single source precursor for developing Si x Zn y O z ternary CEI thin films on NMC811 via molecular layer deposition (MLD) in combination with O 3 or H 2 O as oxidizing agent. We demonstrate that the single precursor (tBuMe 2 Si) 2 Zn avoids the need for two different precursors (Si & Zn). In‐depth spectroscopic studies reveal the mechanism of the formation of organosiloxane/zinc‐oxide composite thin film, via intermediates of unprecedented organo‐silicon‐zinc compounds. Understanding the reaction mechanism paved the path for a successful deposition of ACEI on NMC811. Rate capability studies shows the ACEI protected cathodes exhibit higher discharge capacity at 4 C than pristine NMC811. Furthermore, studies on full cells with graphite anode were conducted to evaluate the practical viability of Si x Zn y O z ACEI thin films on NMC811. After prolonged cycling the ACEI‐coated NMC811 full cells significantly improved the electrochemical performance than pristine NMC811 by ~12%. |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| DOI: |
10.1002/batt.202400241 |
| Availability: |
https://doi.org/10.1002/batt.202400241 |
| Rights: |
http://creativecommons.org/licenses/by-nc/4.0/ |
| Accession Number: |
edsbas.4D9823D |
| Database: |
BASE |