Please use this identifier to cite or link to this item:
http://hdl.handle.net/1942/38996
Title: | Elucidating the optimized P2 type Na0.67Mn1−xCuxO2 cathode active material via operando XAS | Authors: | Altin, S. Altundag, S. Altin, E. VANPOUCKE, Danny E.P. Avci, S. Ates, M.N. |
Issue Date: | 2023 | Publisher: | Source: | JOURNAL OF ALLOYS AND COMPOUNDS, 936 (Art N° 168138) | Abstract: | Here we report on the structural and electrochemical properties of P2-type Na0.67Mn1−xCuxO2 (where x = 0.20–0.50) via various techniques. X-ray diffraction (XRD) reveals a reduction of the unit cell volume upon substitution of Cu elucidated through detailed Rietveld analysis. The cyclic voltammetry (CV) behavior is also affected by the Cu substitution indicating new redox reactions stemming from Cu substitution. Galvanostatic cycling measurements at room temperature show that when x = 0.35 in a P2-type Na0.67Mn1−xCuxO2 cathode active material, the best electrochemical performance is obtained. The Na-ion diffusion rate is found to be strongly dependent upon the environmental temperature. Changes in the valence state and the local structures of P2-type Na0.67Mn1−xCuxO2 during the charge/discharge are investigated through the operando X-ray absorption spectroscopy (XAS) technique. | Other: | Author names need to be updated to reflect the "published author names"(including middle names) and linked to the employee names in case these differ. | Keywords: | Na0.67MnO2;Cu-substitution;Na-ion;Operando XAS | Document URI: | http://hdl.handle.net/1942/38996 | ISSN: | 0925-8388 | e-ISSN: | 1873-4669 | DOI: | 10.1016/j.jallcom.2022.168138 | ISI #: | 000935575100001 | Category: | A1 | Type: | Journal Contribution |
Appears in Collections: | Research publications |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
2023_JALCOM_SAltinDEPVanpoucke_CathodeMaterial.pdf Restricted Access | Published version | 5.87 MB | Adobe PDF | View/Open Request a copy |
2_Cu Manuscript_j_alloy_compounds.pdf Until 2025-03-05 | Peer-reviewed author version | 3.41 MB | Adobe PDF | View/Open Request a copy |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.