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URN to cite this document: urn:nbn:de:bvb:703-epub-9059-6
Title data
Zhang, Kang ; Zheng, Yichun ; Yin, Jianhua ; Yan, Yawen ; Chen, Yilong ; Tian, Yuan ; Huang, Yizhen ; Li, Lianpeng ; Xue, Jiyuan ; Jiao, Wen ; Liu, Na ; Zheng, Lirong ; Huang, Huan ; Zhang, Jing ; Wong, Deniz ; Chiogo, Bodry Tegomo ; Schulz, Christian ; Sun, Yang ; Shen, Chongheng ; Wang, Qingsong ; Qiao, Yu ; Sun, Shi-Gang:
Unveiling the Influence of Formation Voltage on Li-Rich Layered Oxide Cathode.
In: Angewandte Chemie International Edition.
Vol. 64
(2025)
Issue 46
.
- e202515719.
ISSN 1521-3773
DOI der Verlagsversion: https://doi.org/10.1002/anie.202515719
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Abstract
Lithium-rich layered oxide (LRLO) cathodes are recognized for their high energy densities, primarily driven by oxygen-related anionic redox activities, yet substantial activation of this process simultaneously induces structural instability. The typical voltage range in academic studies spans 2.0–4.8 V. Although 2.5–4.5 V are generally considered in industrial applications for enhanced capacity retention and electrolyte compatibility, this moderate voltage window leads to reduced capacity. To address energy density limitations, several top battery suppliers propose to separately increase the formation voltage during the initial cycle to enhance capacity, while other companies (e.g., Contemporary Amperex Technology Co., Ltd., CATL) claim that this high-voltage formation protocol would exacerbate cycling capacity fading. Herein, we systemically demonstrate that high-voltage formation promotes substantial Li+ extraction from the transition metal (TM) layers, creating vacancies (in TM layer) that drive in-plane TM migration. This migration triggers a transformation in the OM6 (M, cation) configuration from O4 (OLixTM2) to O5 (OLiyTM1). Such evolution simultaneously enhances both anionic and cationic redox activity, collectively boosting capacity. Nonetheless, the induced in-plane TM migration would further aggravate out-of-plane TM migration, leading to progressive structural degradation, which has been elucidated as the main reason for cycling capacity fading.
Further data
| Item Type: | Article in a journal |
|---|---|
| Keywords: | Anionic redox; Formation voltage; Lithium-ion batteries; Lithium-rich layered oxide cathode; TM migration |
| DDC Subjects: | 500 Science > 500 Natural sciences 500 Science > 540 Chemistry |
| Institutions of the University: | Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry Research Institutions > Central research institutes > Bayerisches Zentrum für Batterietechnik - BayBatt Faculties Faculties > Faculty of Biology, Chemistry and Earth Sciences Research Institutions Research Institutions > Central research institutes |
| Language: | English |
| Originates at UBT: | Yes |
| URN: | urn:nbn:de:bvb:703-epub-9059-6 |
| Date Deposited: | 31 Mar 2026 12:40 |
| Last Modified: | 31 Mar 2026 12:43 |
| URI: | https://epub.uni-bayreuth.de/id/eprint/9059 |
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