Quasi-Solid-State Na–O2 Battery with Composite Polymer Electrolyte
Journal
ACS Applied Materials & Interfaces
Journal Volume
16
Journal Issue
28
Start Page
36289
End Page
36294
ISSN
1944-8244
1944-8252
Date Issued
2024-07-02
Author(s)
Abstract
Na–O2 batteries have emerged as promising candidates due to their high theoretical energy density (1,601 Wh kg–1), the potential for high energy storage efficiency, and the abundance of sodium in the earth’s crust. Considering the safety issue, quasi-solid-state composite polymer electrolytes are among the promising solid-state electrolyte candidates. Their higher mechanical toughness provides superior resistance to dendritic penetration compared with traditional liquid electrolytes. The flexibility of the composite polymer electrolyte matrix allows it to conform to various battery configurations and considerably reduces safety concerns related to the combustion risks associated with conventional liquid electrolytes. In this study, we employed poly(ethylene oxide) (PEO) and sodium bis(trifluoromethanesulfonyl)imide (NaTFSI) as the polymer matrix and sodium ion-conducting agent, respectively. We incorporated nanosized NZSP (25 wt %) to create the composite polymer electrolyte membrane. This CPE design facilitates ion conduction pathways through both sodium salt and NZSP. By utilizing a liquid electrolyte infiltration method, we successfully enhanced its ionic conductivity, achieving an ionic conductivity of 10–4 S cm–1 at room temperature.
Subjects
Na−O2 battery
quasi-solid-state
composite polymer electrolyte
oxygen reduction reaction
electrochemical reaction
SDGs
Publisher
American Chemical Society (ACS)
Type
journal article