10.1021/acsenergylett.6b00609.s001
Parameswara
Rao Chinnam
Parameswara
Rao
Chinnam
Stephanie L. Wunder
Stephanie L.
Wunder
Engineered Interfaces in Hybrid Ceramic–Polymer
Electrolytes for Use in All-Solid-State Li Batteries
American Chemical Society
2016
polymer
All-Solid-State Li Batteries Composites
conformal SiO 2 coating
CH 3 CH 2 O
Li 0 metal
SiO 2
lithium ion batteries
silanated SiO 2 interface
LICGC
OCH
2016-12-09 00:00:00
Journal contribution
https://acs.figshare.com/articles/journal_contribution/Engineered_Interfaces_in_Hybrid_Ceramic_Polymer_Electrolytes_for_Use_in_All-Solid-State_Li_Batteries/4438052
Composites
of inorganic lithium ion conducting glass ceramics (LICGCs)
and organic polymers may provide the best combination of properties
for safe solid separators in lithium or lithium ion batteries to replace
the currently used volatile liquid electrolytes. A key problem for
their use is the high interfacial resistance that develops between
the two, increasing the total cell impedance. Here we show that the
application of a thin conformal SiO<sub>2</sub> coating onto a LICGC
followed by silanization with (CH<sub>3</sub>CH<sub>2</sub>O)<sub>3</sub>–Si–(OCH<sub>2</sub>CH<sub>2</sub>)–OCH<sub>3</sub> in the presence of LiTFSI results in good adhesion between
the SiO<sub>2</sub> and the LICGC, a low resistance interface, and
good wetting of Li<sup>0</sup>. Further, the cross-linked polymer
formed on the surface of the silanated SiO<sub>2</sub> interface formed
from excess (CH<sub>3</sub>CH<sub>2</sub>O)<sub>3</sub>–Si–(OCH<sub>2</sub>CH<sub>2</sub>)–OCH<sub>3</sub> prevents corrosion
of the LICGC by Li<sup>0</sup> metal. The use of SiO<sub>2</sub> as
a “glue” enables compatibilization of inorganic ceramics
with other polymers and introduction of interfacial pendant anions.