Polyoxometalates (POMs): from electroactive clusters to energy materials

Horn, Michael; Singh, Amandeep; Alomari, Suaad A.; Goberna‐Ferrón, Sara; Benages‐Vilau, Raúl; Chodankar, Nilesh R.; Motta, Nunzio; Ostrikov, Kostya Ken; MacLeod, Jennifer; Sonar, Prashant; Gómez‐Romero, Pedro; Dubal, Deepak P.

doi:10.1039/d0ee03407j

Cited by 235 publications

(167 citation statements)

References 332 publications

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“…The multiform of arrangements and compositions would provide the possibility and feasibility for the future applications. [214,215] In this regard, more efforts are still needed to overcome the insufficient fundamental understanding of the self-assembly behaviors and mechanism of POMs. Some novel characterization techniques that can provide quantitative and real-time insights into the self-assembly process of POM clusters are important for the future development of this area.…”

Section: Conclusion and Perspectivementioning

confidence: 99%

The Intrinsic Charge Carrier Behaviors and Applications of Polyoxometalate Clusters Based Materials

et al. 2021

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Polyoxometalates (POMs) are a series of molecular metal oxide clusters, which span the two domains of solutes and solid metal oxides. The unique characters of POMs in structure, geometry, and adjustable redox properties have attracted widespread attention in functional material synthesis, catalysis, electronic devices, and electrochemical energy storage and conversion. This review is focused on the links between the intrinsic charge carrier behaviors of POMs from a chemistry‐oriented view and their recent ground‐breaking developments in related areas. First, the advantageous charge transfer behaviors of POMs in molecular‐level electronic devices are summarized. Solar‐driven, thermal‐driven, and electrochemical‐driven charge carrier behaviors of POMs in energy generation, conversion and storage systems are also discussed. Finally, present challenges and fundamental insights are discussed as to the advanced design of functional systems based upon POM building blocks for their possible emerging application areas.

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Section: Conclusion and Perspectivementioning

confidence: 99%

The Intrinsic Charge Carrier Behaviors and Applications of Polyoxometalate Clusters Based Materials

et al. 2021

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“…POMs, on the other hand, have been discovered to play a key part in the extraordinary development of PCMs having greater efficiency and stability. PCMs are also being used to create neoteric smart structures for applications such as optics [10,11,14], pharmaceuticals [15][16][17], energy-related applications [18][19][20], sensors [21][22][23], and green catalysis [24][25][26] (Fig. 1).…”

Section: Abstract a R T I C L E I N F O R M A T I O Nmentioning

confidence: 99%

Application of Polyoxometalate-based composites for sensor systems: A review

Khalilpour

Shafiee

Darbandi

et al. 2021

jcc

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“…Polyoxometalates (POMs) are transition metal oxide clusters of around 1 nm in size, capable of delivering fast reversible multi-electron redox reactions, making them a competitive candidate in various energy storage devices [10]. For supercapacitors, POMs usually do not act as the active materials alone since the ion diffusion rate in crystallized POMs is sluggish, contrary to the high-power characteristic of supercapacitors.…”

Section: Introductionmentioning

confidence: 99%

Coherent Integration of Organic Gel Polymer Electrolyte and Ambipolar Polyoxometalate Hybrid Nanocomposite Electrode in a Compact High-Performance Supercapacitor

2022

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We report a gel polymer electrolyte (GPE) supercapacitor concept with improved pathways for ion transport, thanks to a facile creation of a coherent continuous distribution of the electrolyte throughout the electrode. Poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) was chosen as the polymer framework for organic electrolytes. A permeating distribution of the GPE into the electrodes, acting both as integrated electrolyte and binder, as well as thin separator, promotes ion diffusion and increases the active electrode–electrolyte interface, which leads to improvements both in capacitance and rate capability. An activation process induced during the first charge–discharge cycles was detected, after which, the charge transfer resistance and Warburg impedance decrease. We found that a GPE thickness of 12 μm led to optimal capacitance and rate capability. A novel hybrid nanocomposite material, formed by the tetraethylammonium salt of the 1 nm-sized phosphomolybdate cluster and activated carbon (AC/TEAPMo12), was shown to improve its capacitive performance with this gel electrolyte arrangement. Due to the homogeneous dispersion of PMo12 clusters, its energy storage process is non-diffusion-controlled. In the symmetric capacitors, the hybrid nanocomposite material can perform redox reactions in both the positive and the negative electrodes in an ambipolar mode. The volumetric capacitance of a symmetric supercapacitor made with the hybrid electrodes increased by 40% compared to a cell with parent AC electrodes. Due to the synergy between permeating GPE and the hybrid electrodes, the GPE hybrid symmetric capacitor delivers three times more energy density at higher power densities and equivalent cycle stability compared with conventional AC symmetric capacitors.

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Polyoxometalates (POMs): from electroactive clusters to energy materials

Abstract: Polyoxometalates (POMs) represent a class of nanomaterials, which hold enormous promise for a range of energy-related applications. Their promise is owing to their “special” structure that gives POMs a truly...

Cited by 235 publications

References 332 publications

The Intrinsic Charge Carrier Behaviors and Applications of Polyoxometalate Clusters Based Materials

The Intrinsic Charge Carrier Behaviors and Applications of Polyoxometalate Clusters Based Materials

Application of Polyoxometalate-based composites for sensor systems: A review

Coherent Integration of Organic Gel Polymer Electrolyte and Ambipolar Polyoxometalate Hybrid Nanocomposite Electrode in a Compact High-Performance Supercapacitor

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