Spectroscopic Evidence of Surface Li-Depletion of Lithium Transition-Metal Phosphates
Description
The surface chemistries of carefully synthesized, phase pure lithium transition-metal phosphates LiTMPO4 (TM = Fe, Mn, Co, Ni) have been determined using a combination of surface spectroscopic techniques. Results obtained with X-ray photoelectron spectroscopy, Raman spectroscopy, and soft X-ray absorption spectroscopy indicate the presence of surface Li-depletion and mixed chemical states of transition-metal (TM) ions across the family. The extent of surface TM mixed chemical states has been found responsible for changes in color and optical absorption edge positions, which are often used to validate electronic band structure calculations. These characteristics are common in many complex metal oxide ceramics and may not be unique to lithium metal phosphate battery materials.
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| ID Code: | 208677 | ||||
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| Item Type: | Contribution to Journal (Journal Article) | ||||
| Refereed: | Yes | ||||
| ORCID iD: |
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| Additional Information: | Funding Information: Y.Z. would like to acknowledge CSIRO for the studentship, and the involvement of CRRC and the Rail Manufacturing Cooperative Research Centre (funded jointly by participating rail organizations and the Australian Federal Government’s Cooperative Research Centers Program). The in-lab experimental data reported in this paper were obtained at the Central Analytical Research Facility operated by the Institute for Future Environments, Queensland University of Technology (QUT), Brisbane, Australia. The soft X-ray absorption spectra were collected at Australian Synchrotron (AS) with the assistance of Dr. Bruce C.C. Cowie. The authors would like to acknowledge Llew Rintoul, QUT, for the assistance of Raman spectroscopy, and Michael Jones, QUT, for the assistance of the proposal for Australian Synchrotron beamline application. | ||||
| Measurements or Duration: | 11 pages | ||||
| Keywords: | Li-depletion, lithium ion battery, lithium transition metal phosphates, soft X-ray spectroscopy, surface characterization, surface mixed oxidation, surface properties | ||||
| DOI: | 10.1021/acsaem.9b02489 | ||||
| ISSN: | 2574-0962 | ||||
| Pure ID: | 75952495 | ||||
| Divisions: | Current > Research Centres > Centre for Materials Science Current > Research Centres > Centre for Clean Energy Technologies & Practices Past > Institutes > Institute for Future Environments Past > QUT Faculties & Divisions > Science & Engineering Faculty Current > QUT Faculties and Divisions > Faculty of Science Current > Schools > School of Chemistry & Physics |
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| Funding Information: | Y.Z. would like to acknowledge CSIRO for the studentship, and the involvement of CRRC and the Rail Manufacturing Cooperative Research Centre (funded jointly by participating rail organizations and the Australian Federal Government’s Cooperative Research Centers Program). The in-lab experimental data reported in this paper were obtained at the Central Analytical Research Facility operated by the Institute for Future Environments, Queensland University of Technology (QUT), Brisbane, Australia. The soft X-ray absorption spectra were collected at Australian Synchrotron (AS) with the assistance of Dr. Bruce C.C. Cowie. The authors would like to acknowledge Llew Rintoul, QUT, for the assistance of Raman spectroscopy, and Michael Jones, QUT, for the assistance of the proposal for Australian Synchrotron beamline application. | ||||
| Copyright Owner: | 2020 American Chemical Society | ||||
| 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: | 10 Mar 2021 01:06 | ||||
| Last Modified: | 29 Feb 2024 11:04 |
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