1 research outputs found
Supramolecular Self-Assembly of Methylated Rotaxanes for Solid Polymer Electrolyte Application
Li<sup>+</sup>-conducting
solid polymer electrolytes (SPEs) obtained
from supramolecular self-assembly of trimethylated cyclodextrin (TMCD),
poly(ethylene oxide) (PEO), and lithium salt are investigated for
application in lithium-metal batteries (LMBs) and lithium-ion batteries
(LIBs). The considered electrolytes comprise nanochannels for fast
lithium-ion transport formed by CD threaded on PEO chains. It is demonstrated
that tailored modification of CD beneficially influences the structure
and transport properties of solid polymer electrolytes, thereby enabling
their application in LMBs. Molecular dynamics (MD) simulation and
experimental data reveal that modification of CDs shifts the steady
state between lithium ions inside and outside the channels, in this
way improving the achievable ionic conductivity. Notably, the designed
SPEs facilitated galvanostatic cycling in LMBs at fast charging and
discharging rates for more than 200 cycles and high Coulombic efficiency