Batch treatability studies for a Cr(VI)-contaminated glacial soil from a Cr plating facility were conducted using 1X and 2X the stoichiometric ratio of calcium polysulfide (CPS). The pH of the treated soil increased from 6 to 11 upon CPS addition, but progressively returned to 8-8.5 over the course of 1 year. The 1X dosage maintained a highly reducing environment up to 21 days of monitoring wit...

The lithium-sulfur (Li-S) battery is one of the most promising substitutes for current energy storage systems because its low cost, high theoretical capacity, and density. However, solubility intermediate products (i.e., lithium polysulfides) resultant shuttle effect lead to rapidly fading capacity a coulombic efficiency, which hinder practical application Li-S batteries. In this study, block c...

The high theoretical specific capacity of lithium-sulfur (Li-S) batteries makes them a more promising energy storage system than conventional lithium-ion (LIBs). However, the slow kinetics electrochemical conversion reaction seriously hinders utilization Li-S as an active battery material and has prevented successful application cells. Therefore, exploration alternatives that can overcome slugg...

The influence of the Lewis basicity of alkali polysulfide fluxes (A(2)S(x)) (A = alkali) as a function of x on the respective reactivities of Pb and Sn with Ge was studied and found to be strong. Cs(4)Pb(4)Ge(5)S(16), K(2)PbGe(2)S(6), and K(4)Sn(3)Ge(3)S(14) could be prepared only under low basicity with S/A(2)S ratios of > or =11. These compounds display complex frameworks and are semiconducto...