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β-V₂O₅ as Magnesium Intercalation Cathode.

ABSTRACT: Magnesium batteries have attracted great attention as an alternative to Li-ion batteries but still suffer from limited choice of positive electrode materials. V₂O₅ exhibits high theoretical capacities, but previous studies have been mostly limited to α-V₂O₅. Herein, we report on the β-V₂O₅ polymorph as a Mg intercalation electrode. The structural changes associated with the Mg²⁺ (de-) intercalation were analyzed by a combination of several characterization techniques: in situ high resolution X-ray diffraction, scanning transmission electron microscopy, electron energy-loss spectroscopy, and X-ray absorption spectroscopy. The reversible capacity reached 361 mAh g^-1, the highest value found at room temperature for V₂O₅ polymorphs.

SUBMITTER: Trocoli R

PROVIDER: S-EPMC9597546 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature

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β-V2O5 as Magnesium Intercalation Cathode.

Trócoli Rafael R Parajuli Prakash P Frontera Carlos C Black Ashley P AP Alexander Grant C B GCB Roy Indrani I Arroyo-de Dompablo M Elena ME Klie Robert F RF Cabana Jordi J Palacín M Rosa MR

ACS applied energy materials 20221003 10

Magnesium batteries have attracted great attention as an alternative to Li-ion batteries but still suffer from limited choice of positive electrode materials. V2O5 exhibits high theoretical capacities, but previous studies have been mostly limited to α-V2O5. Herein, we report on the β-V2O5 polymorph as a Mg intercalation electrode. The structural changes associated with the Mg2+ (de-) intercalation were analyzed by a co ...[more]

PMID: 36311467

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