High energy storage of Li-ions on keggin-type polyoxometalate as electrodes for rechargeable lithium batteries

Sodium ion intercalation and multi redox behavior of a Keggin type polyoxometalate during [PMo10V2O40]5−to [PMo10V2O40]27−as a cathode material for Na-ion rechargeable batteries

“…The calculated BE for H + in the H-POM is À100.65 eV. 35 It is very important to note that the complexation energy of the Na-POM structure is signicantly very less compare to the H-POM. Due to the dispersive nature of Na + ions, they can easily diffuse on the surface and ow between the electrodes during the redox reaction.…”

“…The synthesis of the H-POM is given in our previous work. 35 The Na-POM was synthesized according to a patent with slight modications. 36 Typically, V 2 O 5 (5 mmol) was dispersed in 20 ml of distilled water and heated at 70 C. To the above mixture, Na 2 CO 3 (5 mmol) was added, and the solution was heated to reux at 90 C for 2 h. Then, MoO 3 (50 mmol) was added into the reaction mixture with constant stirring and reux for an additional 1 h. The solution was ltered to remove the impurities.…”

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

“…Introducing lighter and cheaper transition metals into the POM cluster, such as Fe, Co, V, Mn, and Ni, will be important to increase the mass-specific capacity/capacitance and decrease the cost for supercapacitors and rechargeable Libatteries. [176,198] Furthermore, cathode materials usually play very important roles in the high-energy density rechargeable Li-batteries. Compared with the development of POM-based anode materials, the capacities and voltages of POM-based cathode materials are still required to be improved (Figure 19c).…”

Formation of the [Ge4O16Al48(OH)108(H2O)24]20+ Tetramer from Condensation of ε-GeAl12 Keggin Polycations

“…[3][4][5][6] The chemical diversity of the Keggin-topology and the reactivity of these nanoscale clusters has resulted in their use within industrial catalysis and water purification. [7][8][9] Additional efforts are ongoing to explore their use as metallodrugs for cancer treatement 10 , electrodes for Li + batteries and energy storage [11][12] , multifunctional sensor 13 and redox-based nonvolatile memory materials 14 . The metal oxo Keggin clusters containing aluminum, iron and others have also been found in natural systems and believe to control different geochemical processes.…”