Dawson‐Type Polyoxomolybdate Anions (P₂Mo₁₈O₆₂⁶⁻) Captured by Ionic Liquid on Graphene Oxide as High‐Capacity Anode Material for Lithium‐Ion Batteries

Abstract

The development of advanced anode materials is of significance for the next generation of lithium-ion batteries (LIBs). Herein, imidazolium-based ionic liquids (ILs) are grafted covalently on the surface of graphene oxides (GO) through the carboxyl-amino bond, providing a loading hotbed for the Dawson-type polyoxometalate (POM) of (NH ) P Mo O (denoted as P Mo ). The as-prepared GO-IL-P Mo nanocomposite is characterized by FTIR and Raman spectroscopy, TGA, SEM, TEM, and XPS. The nanocomposite is used as the anode material for LIBs, and shows a high reversible capacity of 903.9 mAh g with a long cycle life over 1000 cycles. Galvanostatic cycling tests, CV measurements, and AC impedance spectra reveal that the POMs in the GO-IL-P Mo nanocomposite give an enhanced specific capacity during the Lithium insertion/extraction process, and the IL provides a favored contact between the electrolyte and the electrode.

Three‐Dimensional Carbon Framework Anchored Polyoxometalate as a High‐Performance Anode for Lithium‐Ion Batteries

“…It is well known that the morphology and pore size of anodes have a significant influence in regulating the Li + transport and storage performance in LIBs. Although it has been reported that POMs can be immobilized on carbon materials with different morphologies for anodes, such as 1D carbon nanotubes, 2D GO, and so on, few studies can be found on 3D POM‐based anode materials for Li‐ion batteries.…”

Polyoxometalates: Tailoring metal oxides in molecular dimension toward energy applications

“…The detailed mechanisms of –NH 2 and –OH groups in PMo 12 ‐based polyoxomolybdate for battery application are evaluated theoretically, revealing the importance of π‐π stacking between graphene and polyoxomolybdate . Furthermore, The Dawson‐type polyoxomolybdate P 2 Mo 18 O 62 6− is bonded to the graphene oxide with superior polyoxometalate attachment via ionic liquids for enhanced lithium storage, while PMo 12 /polypyrrole/reduced graphene oxide composite is fabricated for lithium‐ion battery, which exhibits uniform distribution of polyoxometalate on graphene oxide surface owing to the presence of polypyrrole . Comparatively, polyaniline/PMo 12 O 40 ] 3− composite nanofibers are employed for lithium‐ion batteries, with the one‐dimensional structure accommodating the volume change .…”

Devisable POM/Ni Foam Composite: Precisely Control Synthesis toward Enhanced Hydrogen Evolution Reaction at High pH

“…Polyoxometalates (POMs), as a class of anionic transition metal oxides, which show a rich diversity of structural types and reversible multi‐electron redox behaviours . Owing to their unique electron sponge behaviour, POMs exhibit proton‐coupled multi‐electron transfers .…”

“…Polyoxometalates (POMs), as ac lass of anionic transition metal oxides, which show ar ich diversity of structural types and reversiblem ulti-electronr edoxb ehaviours. [16][17][18] Owing to their unique electron sponge behaviour,P OMs exhibit protoncoupled multi-electron transfers. [19][20][21][22] More importantly,t he electrocatalytic efficiency can be tuned by adjusting the chemical compositiona nd microenvironment of POMs.…”