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Manipulated Fluoro-Ether Derived Nucleophilic Decomposition Products for Mitigating Polarization-Induced Capacity Loss in Li-Rich Layered Cathode

Title data

Zhang, Baodan ; Zhang, Haitang ; Luo, Haiyan ; Hua, Haiming ; Wu, Xiaohong ; Chen, Yilong ; Zhou, Shiyuan ; Yin, Jianhua ; Zhang, Kang ; Liao, Hong-Gang ; Wang, Qingsong ; Zou, Yeguo ; Qiao, Yu ; Sun, Shi-Gang:
Manipulated Fluoro-Ether Derived Nucleophilic Decomposition Products for Mitigating Polarization-Induced Capacity Loss in Li-Rich Layered Cathode.
In: Angewandte Chemie International Edition. Vol. 63 (2024) Issue 6 . - e202316790.
ISSN 1521-3773
DOI: https://doi.org/10.1002/anie.202316790

Official URL: Volltext

Abstract in another language

Abstract Electrolyte engineering is a fascinating choice to improve the performance of Li-rich layered oxide cathodes (LRLO) for high-energy lithium-ion batteries. However, many existing electrolyte designs and adjustment principles tend to overlook the unique challenges posed by LRLO, particularly the nucleophilic attack. Here, we introduce an electrolyte modification by locally replacing carbonate solvents in traditional electrolytes with a fluoro-ether. By benefit of the decomposition of fluoro-ether under nucleophilic O-related attacks, which delivers an excellent passivation layer with LiF and polymers, possessing rigidity and flexibility on the LRLO surface. More importantly, the fluoro-ether acts as “sutures”, ensuring the integrity and stability of both interfacial and bulk structures, which contributed to suppressing severe polarization and enhancing the cycling capacity retention from 39 % to 78 % after 300 cycles for the 4.8 V-class LRLO. This key electrolyte strategy with comprehensive analysis, provides new insights into addressing nucleophilic challenge for high-energy anionic redox related cathode systems.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: Anionic Redox; Electrolyte Decomposition; Electrolyte-Electrode Interphases; Li-Rich Cathode; Nucleophilic Attack
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Lehrstuhl Anorganische Aktivmaterialien für elektrochemische Energiespeicher
Research Institutions > Central research institutes > Bayerisches Zentrum für Batterietechnik - BayBatt
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 500 Natural sciences
500 Science > 540 Chemistry
Date Deposited: 18 Jun 2024 12:15
Last Modified: 18 Jun 2024 12:15
URI: https://eref.uni-bayreuth.de/id/eprint/89783