Structure-directing effect of aqueous alkali metal ion (Li+, Na+ and K+) clusters on the polyoxoanion configuration in vanadium–molybdenum polyoxometalate solid solutions

Yao, Zhi-Yuan; Guo-qin, Zhang; Li, Zi-Han; Shen, Lin; Ren, Xiao‐Ming

doi:10.1039/d1ce00875g

Cited by 5 publications

(2 citation statements)

References 39 publications

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“…4(a–c)), while the Na and Mg 1s peaks at 1071.8 and 1304.6 eV and the Zn 2p peaks at 1022.2 and 1045.3 eV can be observed (Fig. S13(a–c)†), 32,51,65 indicating decreased oxidation states of V with ion intercalation. The strong Zn 2p signals (Fig.…”

Section: Resultsmentioning

confidence: 99%

Mechanistic insights into the pseudocapacitive performance of bronze-type vanadium dioxide with mono/multi-valent cations intercalation

Zeng

Jian

et al. 2022

J. Mater. Chem. A

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Section: Resultsmentioning

confidence: 99%

Mechanistic insights into the pseudocapacitive performance of bronze-type vanadium dioxide with mono/multi-valent cations intercalation

Zeng

Jian

et al. 2022

J. Mater. Chem. A

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“…All chemicals, with analysis grade, were purchased commercially and used exactly as received. The decavanadate-type POM, Na 2.0 (NH 4 ) 3.05 [V 9.05 Mo 0.95 O 28 ]•10H 2 O (NaMoV), 23 and Fe-MOF MIL-100 24 were synthesized following the published procedures in the literature.…”

Section: Chemicals and Materialsmentioning

confidence: 99%

Decavanadate-Type Polyoxometalate Anions Encapsulated in a MIL-100 Framework with Enhanced Mixed Ion–Electron Conduction and Potential Application as Cathode Materials for a Lithium Ion Battery

Yao

Xie

et al. 2022

ACS Appl. Eng. Mater.

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Polyoxometalates (POMs) with reversible multielectron redox are called “electron sponges”, showing promising application as electrode materials for LIBs. In this study, Na2.0(NH4)3.05[V9.05Mo0.95O28]·10H2O (NaMoV), a decavanadate-type POM, was successfully encapsulated into the pores of an Fe-based MOF (metal organic framework), MIL-100 (Fe), and a series of NaMoV@MIL-100-x (x = 1.3, 2, 3, 4, which is the feed mass ratio of NaMoV to MIL-100) were prepared and characterized using IR spectroscopy, PXRD, and N2 adsorption–desorption techniques. The maximum amount of NaMoV inserted in the pores of MIL-100 was achieved as x = 3, and this NaMoV@MIL-100-3 composite shows the intrinsic mixed ion–electron conduction and high stability to organic electrolyte in LIBs. NaMoV@MIL-100-3 was evaluated as the cathode material for LIBs, and it demonstrated high discharge capacity (210.7 mA h g–1 at 50 mA g–1) and excellent cycling stability (capacity retention of 84% after 50 cycles at 50 mA g–1). To the best of our knowledge, this is the first time a POM@MOF has demonstrated intrinsic mixed ion–electron conduction and been demonstrated as a cathode material for LIBs. This study demonstrates that, by rational design, POM@MOF materials not only become new types of potential mixed ion–electron conductors but also may serve as cathode materials with high capacity and good cycling stability for LIBs.

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Reversible crystal−amorphous transformation assisted by loss and adsorption of coordination water molecules and ionic conduction in two isomorphous decavanadate-type polyoxometalates

Yao

Xie

et al. 2022

Journal of Solid State Chemistry

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Structure-directing effect of aqueous alkali metal ion (Li⁺, Na⁺ and K⁺) clusters on the polyoxoanion configuration in vanadium–molybdenum polyoxometalate solid solutions

Abstract: In structural chemistry context, the dense packing and the structural directing agent (SDA) often play crucial role in the formation of desired crystal structure. Herein, we present two isomorphous decavanadate-type...

Cited by 5 publications

References 39 publications

Mechanistic insights into the pseudocapacitive performance of bronze-type vanadium dioxide with mono/multi-valent cations intercalation

Mechanistic insights into the pseudocapacitive performance of bronze-type vanadium dioxide with mono/multi-valent cations intercalation

Decavanadate-Type Polyoxometalate Anions Encapsulated in a MIL-100 Framework with Enhanced Mixed Ion–Electron Conduction and Potential Application as Cathode Materials for a Lithium Ion Battery

Reversible crystal−amorphous transformation assisted by loss and adsorption of coordination water molecules and ionic conduction in two isomorphous decavanadate-type polyoxometalates

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