Enhanced Sulfur Transformation by Multifunctional FeS/FeS/S Composites for High-Volumetric Capacity Cathodes in Lithium-Sulfur Batteries.

Lithium-sulfur batteries are currently being explored as promising advanced energy storage systems due to the high theoretical specific capacity of sulfur. However, achieving a scalable synthesis for the sulfur electrode material whilst maintaining a high volumetric energy density remains a serious challenge. Here, a continuous ball-milling route is devised for synthesizing multifunctional FeS/FeS/S composites for use as high tap density electrodes.

Two nanoscale Nb containing polyoxometalates based on {PWNbO} clusters and chromium cations.

Two novel mixed-addenda Nb/W polyoxometalates are successfully fabricated, and investigated as anode materials for lithium-ion batteries. For the CsK{Cr(HO)[PWNbO]}·60HO sample, a reversible capacity (466.6 mA h g) and stable cycle performance are obtained.