Cationic and anionic environments in LiTFSI-doped di-ureasils with application in solid-state electrochromic devices

• Fourier Transform mid-infrared and Raman spectroscopies were used to investigate the cation/polymer, cation/urea bridge, cation/anion and hydrogen bonding interactions in poly(oxyethylene) (POE)/siloxane di-ureasil networks prepared by the sol-gel route and doped with lithium bis(trifluoromethanesulfonyl)imide (LiTFSI). Materials with compositions 200 >= n >= 5 (where n expresses the molar ratio OCH2CH2/Li+) were studied. The Li+ ions coordinate to the urea carbonyl oxygen atoms over the whole range of salt concentration considered. Bonding to the ether oxygen atoms of the POE chains occurs at n

Subject headings

TEKNIK OCH TEKNOLOGIER  -- Annan teknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Other Engineering and Technologies (hsv//eng)

Keyword

POLY(ETHYLENE OXIDE)

sol-gel

COMPLEXES

RAMAN-SPECTRA

ORMOLYTES

LIQUID

FT-Raman spectroscopy

LITHIUM PERCHLORATE

INFRARED TEMPERATURE

OXIDATION

FT-IR

POLYMER ELECTROLYTE

LiTFSI

PHYSICAL-PROPERTIES

di-ureasils

Publication and Content Type

art (subject category)

ref (subject category)