Nanoscale differentiation of surfaces and cores for olivine phosphate particles-A key characteristic of practical battery materials
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Description
We provide a review of our recent studies on the surface chemistries and electronic structures of olivine phosphate cathode materials LiMPO4 (M = Mn, Fe, Co, Ni). Li-depletion and mixed oxidation for the transition metal ions have been detected on particle surfaces, across the family of metal phosphate cathode materials. The effects of surface Li-depletion on optical properties and electronic band structures are discussed. LiFePO4 doped with metals or ions that are reported in the literature as beneficial for rate capability enhancement show more pronounced surface Li-depletion and mixed oxidation compared to undoped material. This outcome, among others, indicates that the dopant resides predominantly on, and influences, the surface of cathode materials.
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| ID Code: | 210432 | ||||||||
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| Item Type: | Contribution to Journal (Review article) | ||||||||
| Refereed: | Yes | ||||||||
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| Additional Information: | Acknowledgements: Y Zhang would like to acknowledge CSIRO for the studentship, with involvement of CRRC and the Rail Manufacturing Cooperative Research Centre (funded jointly by participating rail organisations and the Australian Federal Government's Cooperative Research Centres Program). The experimental data were obtained at the Central Analytical Research Facility operated by the Institute for Future Environments, Queensland University of Technology (QUT), Brisbane, Australia. The authors acknowledge Dr Michael Jones, QUT, for the assistance with the proposal for Australian Synchrotron beamline application and the Australian Synchrotron for the awarded beamtime. Computational resources and services used in this work were provided by the HPC and Research Support Group, eResearch Office, QUT. Partial support was also provided from the Australian Renewable Energy Agency (ARENA) Research and Development Program—Renewable Hydrogen for Export (Contract No. 2018/RND012). | ||||||||
| Measurements or Duration: | 11 pages | ||||||||
| Keywords: | band gap, cathode materials, DFT, electronic band structure, lithium-ion batteries, olivine phosphates, surface | ||||||||
| DOI: | 10.1088/2515-7655/abe2f5 | ||||||||
| ISSN: | 2515-7655 | ||||||||
| Pure ID: | 84244542 | ||||||||
| Divisions: | Current > Research Centres > Centre for Materials Science Current > Research Centres > Centre for Clean Energy Technologies & Practices Current > QUT Faculties and Divisions > Faculty of Science Current > Schools > School of Chemistry & Physics Current > Schools > School of Earth & Atmospheric Sciences |
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| Copyright Owner: | 2021 The Author(s). Published by IOP Publishing Ltd | ||||||||
| Copyright Statement: | This work is covered by copyright. Unless the document is being made available under a Creative Commons Licence, you must assume that re-use is limited to personal use and that permission from the copyright owner must be obtained for all other uses. If the document is available under a Creative Commons License (or other specified license) then refer to the Licence for details of permitted re-use. It is a condition of access that users recognise and abide by the legal requirements associated with these rights. If you believe that this work infringes copyright please provide details by email to qut.copyright@qut.edu.au | ||||||||
| Deposited On: | 17 May 2021 04:20 | ||||||||
| Last Modified: | 01 Jul 2024 03:35 |
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