Cai, Hong, Chen, Ruiyong 
ORCID: 0000-0002-5340-248X, Bahri, Mounib ORCID: 0000-0002-8336-9158, Hawkins, Cara J, Sonni, Manel, Daniels, Luke M ORCID: 0000-0002-7077-6125, Lim, Jungwoo ORCID: 0000-0002-4123-2882, Evans, Jae A, Zanella, Marco, Jones, Leanne AH et al (show 7 more authors)
(2023)
Fluorine-Rich Oxyfluoride Spinel-like Li1.25Ni0.625Mn1.125O3F Utilizing Redox-Active Ni and Mn for High Capacity and Improved Cyclability.
ACS MATERIALS LETTERS, 5 (2).
pp. 527-535.
Abstract
Extending the accessible capacity and cyclability is of central interest for cathode materials for Li-ion batteries. Here, we report the successful synthesis of a new spinel-like Li1.25Ni0.625Mn1.125O3F (Fd3m) oxyfluoride with significant cation disorder characterized by combined refinement of X-ray and neutron diffraction data. Li1.25Ni0.625Mn1.125O3F utilizes redox reactions of both Ni and Mn, accessing capacities of 225 (i.e., 1.46 Li+ capacity) and 285 mAh g-1 (i.e., 1.85 Li+ capacity) at 25 and 40 °C, respectively, through intercalation of additional Li+ into the lattice. Moreover, compared to lithium transition metal disordered rocksalt or spinel-like oxyfluorides previously reported, Li1.25Ni0.625Mn1.125O3F shows significantly improved cycling stability. Ex situ compositional, structural, and spectroscopic analyses of samples at different states of charge/discharge confirm a single-phase intercalation reaction and high structural integrity over cycling.
| Item Type: | Article |
|---|---|
| Divisions: | Faculty of Science and Engineering > School of Engineering Faculty of Science and Engineering > School of Physical Sciences |
| Depositing User: | Symplectic Admin |
| Date Deposited: | 16 Feb 2023 17:34 |
| Last Modified: | 16 Feb 2023 17:35 |
| DOI: | 10.1021/acsmaterialslett.2c00973 |
| Open Access URL: | https://doi.org/10.1021/acsmaterialslett.2c00973 |
| Related URLs: | |
| URI: | https://livrepository.liverpool.ac.uk/id/eprint/3168464 |
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