2018
DOI: 10.1002/celc.201801406
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Differentiating Molecular and Solid‐State Vanadium Oxides as Active Materials in Battery Electrodes

Abstract: Molecular vanadium oxides – polyoxovanadates (POVs) – have recently received widespread interest as new, high performance active materials in lithium ion and sodium ion battery electrodes. This is due to their low molecular weight and their high redox activity. However, little attention has been paid to the structural and chemical stability of the POVs under typical electrode fabrication processes. Here, we report how molecular polyoxovanadates can be differentiated from solid‐state vanadium oxides as active m… Show more

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Cited by 20 publications
(32 citation statements)
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“…This is mainly due to the small ionic radius of vanadium which presents challenges in isolating stable Keggin-and Dawson-type POVs, as well as their corresponding Lacunary derivatives. 51 Seminal contributions into the generation of heteroion-installed polyoxovanadates have been led by Streb [164][165][166][167][168][169][170][171][172][173][174] and others 34,[175][176][177] Fig. 16).…”
Section: Synthesis and Structure Of "Doped" Pov Clustersmentioning
confidence: 99%
“…This is mainly due to the small ionic radius of vanadium which presents challenges in isolating stable Keggin-and Dawson-type POVs, as well as their corresponding Lacunary derivatives. 51 Seminal contributions into the generation of heteroion-installed polyoxovanadates have been led by Streb [164][165][166][167][168][169][170][171][172][173][174] and others 34,[175][176][177] Fig. 16).…”
Section: Synthesis and Structure Of "Doped" Pov Clustersmentioning
confidence: 99%
“…Considering that structural rearrangement of polyoxometalates to metal oxides typically occurs at temperatures above 200 °C, no phase transition of the mPTA is attributed to their low synthetic temperature of 100 °C. [14] The primary crystallite size of the materials calculated from Scherrer equation to the main peak of (222) is found to be 20.32, 17.78 and 22.46 nm for 2.5-mPTA, 5.0-mPTA and 10-mPTA. The highly crystalline PTA consists in the wall structure of the porous materials.…”
mentioning
confidence: 90%
“…The wide‐angle XRD patterns of these samples exactly coincide with that of K 3 PW 12 O 40 (Figure b), confirming that no phase transition of PTA to tungsten oxides occurred during the synthetic reactions. Considering that structural rearrangement of polyoxometalates to metal oxides typically occurs at temperatures above 200 °C, the failure of mPTA to undergo a phase transition is attributed to the low synthesis temperature of 100 °C . The primary crystallite size of the materials as calculated from the Scherrer equation for the main peak of (222) was 20.32, 17.78, and 22.46 nm for 2.5‐mPTA, 5.0‐mPTA, and 10‐mPTA.…”
Section: Methodsmentioning
confidence: 80%