1 research outputs found
Polymer-Rich Composite Electrolytes for All-Solid-State LiāS Cells
Polymer-rich composite
electrolytes with lithium bisĀ(fluorosulfonyl)Āimide/polyĀ(ethylene
oxide) (LiFSI/PEO) containing either Li-ion conducting glass ceramic
(LICGC) or inorganic Al<sub>2</sub>O<sub>3</sub> fillers are investigated
in all-solid-state LiāS cells. In the presence of the fillers,
the ionic conductivity of the composite polymer electrolytes (CPEs)
does not increase compared to the plain LiFSI/PEO electrolyte at various
tested temperatures. The CPE with Al<sub>2</sub>O<sub>3</sub> fillers
improves the stability of the Li/electrolyte interface, while the
LiāS cell with a LICGC-based CPE delivers high sulfur utilization
of 1111 mAh g<sup>ā1</sup> and areal capacity of 1.14 mAh cm<sup>ā2</sup>. In particular, the cell performance gets further
enhanced when combining these two CPEs (Li | Al<sub>2</sub>O<sub>3</sub>āCPE/LICGCāCPE | S), reaching a capacity of 518 mAh
g<sup>ā1</sup> and 0.53 mAh cm<sup>ā2</sup> with Coulombic
efficiency higher than 99% at the end of 50 cycles at 70 Ā°C.
This study shows that the CPEs can be promising electrolyte candidates
to develop safe and high-performance all-solid-state LiāS batteries