Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 60, Issue 49, Pages 25897-25904Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202109709
Keywords
amorphous PEO; NaClO4; sodium membranes; solid polymer electrolytes; solid-state electrolytes
Categories
Funding
- MITACS organization, Prima Quebec
- Canada Foundation for Innovation
- Natural Sciences and Engineering Research Council of Canada
- Canada Research Chair program
Ask authors/readers for more resources
By dissolving NaClO4 in statistical copolymers, the ionic conductivity of solid polymer electrolytes has been significantly enhanced. The presence of physical cross-links generated by Na+ contributes to this increase in conductivity, paving the way for the design of all-solid-state PEO-based sodium batteries operational at room temperature.
The low conductivity of Na+ electrolytes in solid polymer electrolytes (SPEs) curtails the development of Na polymer batteries. In this study, NaClO4 (3-24 wt %, 90-9:1 O:Na) is dissolved in statistical copolymers of ethylene oxide (EO) and propylene oxide (PO) (0-20 mol %). Remarkably, the conductivity of these SPEs increases as the concentration of Na+ decreases, thus departing from the usual Nernstian behavior. Using a combination of calorimetric measurements and molecular dynamic simulations, this unusual phenomenon is attributed to the presence of physical cross-links generated by Na+. As a result, polymers containing a low salt concentration (3 wt %) display a drastically enhanced ionic conductivity (up to 0.2 10(-4) S cm(-1) at 25 degrees C), thus paving the way for the design of all-solid-state PEO-based sodium batteries operational at room temperature.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available