Hydrothermal transforming phase structure and chemical composition of V2O5 for elevating electrochemical property of zinc ion batteries

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dc.contributor.authorTriosod, Sureerat
dc.contributor.authorPhakkhawan, Authit
dc.contributor.authorPhumuen, Phatcharin
dc.contributor.authorWanabut, Wassana
dc.contributor.authorChanlek, Narong
dc.contributor.authorKumnorkaew, Pisist
dc.contributor.authorKlangtakai, Pawinee
dc.contributor.authorSrepusharawoot, Pornjuk
dc.contributor.authorJarernboon, Wirat
dc.contributor.authorPuttharugsa, Chokchai
dc.contributor.authorThongnum, Anusit
dc.contributor.authorChompoosor, Apiwat
dc.contributor.authorPimanpang, Samuk
dc.contributor.authorRuttanapun, Chesta
dc.contributor.authorAmornkitbamrung, Vittaya
dc.date.accessioned2026-08-06T10:46:08Z
dc.date.available2026-08-06T10:46:08Z
dc.date.issued2024-05-01
dc.description.abstractV<inf>2</inf>O<inf>5</inf> was hydrothermally modified in NaOH or KOH solutions at 180 °C for 24 h. The NaOH-modified powders had a nanorod-like structure with a crystal structure matching Na<inf>2</inf>V<inf>6</inf>O<inf>16</inf>·nH<inf>2</inf>O. The TG/DTA results of Na<inf>2</inf>V<inf>6</inf>O<inf>16</inf>·nH<inf>2</inf>O powders show a mass reduction of 4.24 % at 300 °C, corresponding to n of 1.496. KOH-modified powders have large rods and irregular structures with a crystal structure matching KV<inf>3</inf>O<inf>8</inf>. Its TG/DTA spectrum shows a very small percentage change, just 0.37 % at 600 °C. Cyclic voltammetry (CV) curves of a Na<inf>2</inf>V<inf>6</inf>O<inf>16</inf>·nH<inf>2</inf>O cathode in a 2 M ZnSO<inf>4</inf> electrolyte exhibit higher oxidation and reduction current densities than those of pure V<inf>2</inf>O<inf>5</inf> and KV<inf>3</inf>O<inf>8</inf> electrodes.The best capacity of a Na<inf>2</inf>V<inf>6</inf>O<inf>16</inf>·nH<inf>2</inf>O electrode is 296.10 mAh g<sup>-1</sup> at a current density of 50 mA g<sup>−1</sup>, which is higher than those of pure V<inf>2</inf>O<inf>5</inf> (102.90 mAh g<sup>-1</sup>) and KV<inf>3</inf>O<inf>8</inf> (91.07 mAh g<sup>-1</sup>) electrodes. EDS and XPS results reveal that the charge and discharge states involve de-insertion and insertion of Zn<sup>2+</sup> ions out of/into the electrodes. Computational analysis of Zn intercalation into V<inf>2</inf>O<inf>5</inf>, Na<inf>2</inf>V<inf>6</inf>O<inf>16</inf>·nH<inf>2</inf>O, and KV<inf>3</inf>O<inf>8</inf> structures displays increasing electron density on neighboring V atoms, which explains the increasing V<sup>4+</sup>/V<sup>5+</sup> ratio in the discharged state as evidenced by XPS spectra.
dc.identifier.citationApplied Surface Science, 654, 2024
dc.identifier.doi10.1016/j.apsusc.2024.159468
dc.identifier.issn01694332
dc.identifier.other2-s2.0-85183451718
dc.identifier.urihttps://dspace.kmitl.ac.th/handle/123456789/15649
dc.sourceApplied Surface Science
dc.subjectHydrothermal
dc.subjectKV3O8
dc.subjectNa2V6O16·nH2O
dc.subjectV2O5
dc.subjectZn-ion battery
dc.titleHydrothermal transforming phase structure and chemical composition of V2O5 for elevating electrochemical property of zinc ion batteries
dc.typeArticle

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