Surfactant‐Dependent Charge Transfer between Polyoxometalates and Single‐Walled Carbon Nanotubes: A Fluorescence Spectroscopic Study

Abstract

Hybridizations of redox-active polyoxometalates (POMs) with single-walled carbon nanotubes (SWNTs) have been widely investigated for their diverse applications. For the purpose of constructing high-quality electronic devices, controlling charge transfer within POM/SWNT hybrids is an inevitable issue. As determined by means of fluorescence spectroscopy, electron transfer between SWNTs and a common POM dopant, phosphomolybdic acid (PMo ), can be tuned simply by an alteration of nanotube surfactant type from anionic to nonionic. The mechanism is attributed to the influence of surfactant type on the stabilization of the electron donor-acceptor hybrid and effect of surfactant-nanotube interactions. These results will be important to control charge-transport behavior in nanohybrids consisting of carbon nanotubes.

Polyoxometalates/Active Carbon Thin Separator for Improving Cycle Performance of Lithium–Sulfur Batteries

“…Polyoxometalates (POMs), as anionic metal oxide clusters with the various electronic structures and electrochemical redox behaviors, have been applied in the fields of catalysis, , charge transfer, , and energy systems. − Recently, POMs are expected to be the cathode materials for rechargeable Li–S energy-storage systems in that the metal ion of POM clusters can act as a Lewis acid site to strongly absorb the Li 2 S n moieties . We speculate that POMs could be used as an additive to fabricate the composite membrane in Li–S batteries, thereby blocking the shuttling of polysulfides.…”