Szczegóły publikacji
Opis bibliograficzny
Structural and electrochemical properties of $Na_{0.72}CoO_{2}$ as cathode material for sodium-ion batteries / Dominika BASTER, Wojciech Maziarz, Konrad ŚWIERCZEK, Andrzej Stokłosa, Janina MOLENDA // Journal of Solid State Electrochemistry ; ISSN 1432-8488. — 2015 — vol. 19 iss. 12, s. 3605–3612. — Bibliogr. s. 3612, Abstr. — Publikacja dostępna online od: 2015-07-26
Autorzy (5)
- AGHBaster Dominika
- Maziarz Wojciech
- AGHŚwierczek Konrad
- Stokłosa Andrzej
- AGHMolenda Janina
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 94132 |
|---|---|
| Data dodania do BaDAP | 2015-12-02 |
| Tekst źródłowy | URL |
| DOI | 10.1007/s10008-015-2977-6 |
| Rok publikacji | 2015 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Journal of Solid State Electrochemistry |
Abstract
In this work, results of structural studies, performed as a function of temperature (13–1073 K) of Na0.72CoO2 cathode material, are presented, together with microstructural measurements, including detailed transmission microscopy examination, as well as electrochemical studies, showing current rate-dependent charge/discharge characteristics and also voltammetry tests. It was found that thermal expansion of P2 type (P63/mmc) Na0.72CoO2 differs along a- and c-axes. Microstructural studies showed platelet-like grains of the synthesized sodium cobaltate, while detailed transmission microscopy measurements indicated coexistence of well-defined layered regions with regions having somewhat disturbed atomic arrangement. For higher current densities, characteristic plateaus observed on Na/Na+/NaxCoO2 charge/discharge curves diminish, and the voltage dependence on the sodium concentration is smoothed out. Results of the electrochemical tests, performed on cathodes without any carbon additives, indicated that in fact, such additives influence electrochemical behavior during first charge considerably. Additional voltammetry investigations confirmed presence of nine characteristic anodic and cathodic peaks, corresponding well with plateaus observed during charge/discharge of the cells.
