How to Adequately Describe Full Range Intercalation-A Two-Sided Approach
© 2023 The Authors. Advanced Materials published by Wiley-VCH GmbH.
| Veröffentlicht in: | Advanced materials (Deerfield Beach, Fla.). - 1998. - 35(2023), 35 vom: 03. Sept., Seite e2304666 |
|---|---|
| 1. Verfasser: | |
| Weitere Verfasser: | |
| Format: | Online-Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2023
|
| Zugriff auf das übergeordnete Werk: | Advanced materials (Deerfield Beach, Fla.) |
| Schlagworte: | Journal Article batteries charge-discharge curve intercalation electrodes lithium iron phosphate modeling point defect chemistry |
| Zusammenfassung: | © 2023 The Authors. Advanced Materials published by Wiley-VCH GmbH. One of the key challenges in battery research is to quantitatively describe the intercalation storage capacity as a function of the reversible cell voltage. The reason that such endeavors are not yet very successful, lies in the lack of an adequate charge carrier treatment. Using the most challenging example of nanocrystalline lithium iron phosphate, where the full range from FePO4 to LiFePO4 is accessible without miscibility gap, this study shows how a quantitative description of literature results can be achieved even for such a huge window. For this purpose, point-defect thermodynamics is applied and the problem is tackled from the two end-member sides including saturation effects. A first, rather heuristic treatment interpolates in-between using the safe thermodynamic criterion of local phase stability. Already this straightforward approach works very satisfactorily. In order to also gain mechanistic insight, interactions among and between ions and electrons have to be taken account of. This study shows how to implement them into the analysis |
|---|---|
| Beschreibung: | Date Revised 01.09.2023 published: Print-Electronic Citation Status PubMed-not-MEDLINE |
| ISSN: | 1521-4095 |
| DOI: | 10.1002/adma.202304666 |