Sodium intercalation into α- and β-VOSO4
| Autor: | W. Deriouche, E. Anger, N. Amdouni, V. Pralong |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: | |
| Zdroj: | Chimica Techno Acta, Vol 6, Iss 1, Pp 31-36 (2019) |
| Druh dokumentu: | article |
| ISSN: | 2409-5613 2411-1414 |
| DOI: | 10.15826/chimtech.2019.6.1.04 |
| Popis: | Na-ion battery is one of the best alternatives to Li-ion battery. Abundance of sodium on earth is three orders of magnitude higher than lithium, which should make Na-ion battery technology cheaper. But alkaline-ion battery prices, which tend to increase because of the massive world demand, also depend on the choice of electrode materials. Therefore, cost-effective electrode development remains an important subject of research because this will allow Na-ion battery to be even more competitive. Electrochemical performances of anhydrous VOSO4 as electrode for Na-ion battery are reported in this letter. Two anhydrous phases of vanadyl sulfate have been studied. The first one, α-VOSO4, shows that up to 0.8 sodium per formula unit (Na/f.u.) can be intercalated in this phase, and a reversible intercalation of 0.4 Na/f.u. has been observed with a strong polarization. The second one, β-VOSO4, can intercalate up to 0.9 Na/f.u. with a reversible intercalation of 0.4 Na/f.u. leading to a reversible capacity of 64 mAh/g. |
| Databáze: | Directory of Open Access Journals |
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