2 research outputs found
Cosmogenic Isotope Production in Argon
<p>This presentation was used for the Low-Radioactivity Underground Argon Workshop held at Pacific Northwest National Laboratory in Richland, Washington on March 19 - 20, 2018.</p
Enabling High-Energy-Density Cathode for Lithium–Sulfur Batteries
High-energy
lithium–sulfur (Li–S) battery is built on high loading
and dense sulfur electrodes. Unfortunately, these electrodes usually
suffer from a low sulfur utilization rate and limited cycle life due
to the gap in scientific knowledge between the fundamental research
and the application at relevant scales. In this work, effects of electrode
porosity on the electrode energy density, cell cycling stability,
Li anode interface, and electrolyte/sulfur ratio were investigated
on the basis of high-loading sulfur electrodes. Using electrodes with
sulfur loading of 4 mg cm<sup>–2</sup> and thickness at ∼60
μm, a high energy density of over 1300 Wh L<sup>–1</sup> has been obtained at electrode level, which provides a decent basis
for high-energy Li–S cell development. In addition, Li–S
cells with the high-loading and dense electrodes demonstrate promising
cycling stability (∼80% capacity retention for 200 cycles).
These significant improvements are contributed by the synergistic
effects of dense sulfur cathode, improved electrode wetting, and suppressed
quick growth of the interphase layer on Li-metal anode. This study
sheds light on rational design of sulfur cathode for balanced cell
energy density and cycling life