Title data
Zhang, Baodan ; Wang, Lingling ; Wang, Xiaotong ; Zhou, Shiyuan ; Fu, Ang ; Yan, Yawen ; Wang, Qingsong ; Xie, Qingshui ; Peng, Dongliang ; Qiao, Yu ; Sun, Shi-Gang:
Sustained releasing superoxo scavenger for tailoring the electrode-electrolyte interface on Li-rich cathode.
In: Energy Storage Materials.
Vol. 53
(2022)
.
- pp. 492-504.
ISSN 2405-8297
DOI: https://doi.org/10.1016/j.ensm.2022.09.032
Project information
Project title: |
Project's official title Project's id Nachwuchsgruppe Lehrstuhl für Anorganische Aktivmaterialien electrochemischer Speicher Dr. Qingsong Wang No information |
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Abstract in another language
Triggering O-related anionic redox reactivity can introduce additional capacity in Li-rich layered oxide (LRLO) cathode, while, activated oxygen species also threatens to electrode-electrolyte interface stability. Herein, revealed by in-situ SERS/Raman, we demonstrate that enrichment of superoxo-related species on LRLO surface would significantly aggravate electrolyte degradation by nucleophilic attack, and confuse/deteriorate the architecture of cathode electrolyte interface (CEI) on LRLO. Through rational introducing LiBOB as a boron-contained electrolyte additive, enhanced CEI was achieved with BOB-derived cross-linking and B-F/BxOy polymeric components. More importantly, benefitting from its synergy effect with LiPF6, the sustained release of LiDFOB acts as a superoxo scavenger, which efficiently eliminates related nucleophilic attack. Tailoring the CEI into a uniform, dense, and stable passivate protection front-face, LiBOB additive enhances the cycling stability of LRLO, delivered 92.5 capacity retention (300 cycles). This work arouses reconsideration on the design/modification principle of electrolyte for LRLO cathode, and emphasizes the in-situ superoxo scavenging process.
Further data
Item Type: | Article in a journal |
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Refereed: | Yes |
Keywords: | Li-rich layered oxide; Superoxo scavenger; Electrode-electrolyte interface; Nucleophilic attack; Anionic redox |
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 > Research Centres > Bayerisches Zentrum für Batterietechnik - BayBatt Faculties Faculties > Faculty of Biology, Chemistry and Earth Sciences Research Institutions Research Institutions > Research Centres |
Result of work at the UBT: | Yes |
DDC Subjects: | 500 Science > 500 Natural sciences 500 Science > 540 Chemistry |
Date Deposited: | 02 Nov 2022 07:47 |
Last Modified: | 02 Nov 2022 07:48 |
URI: | https://eref.uni-bayreuth.de/id/eprint/72584 |