Download all files (2.51 MB)

Collection

Citation

Description:

Poly(ethylene oxide) (PEO)-based polymer electrolyte is regarded as a promising candidate for solid-state lithium metal batteries due to its unique lithium conduction mechanism compared to inorganic solid-state electrolyte. However, the development of this electrolyte is hindered by its low ionic conductivity and poor mechanical strength. In this study, we enhance the mechanical stability and ionic conductivity of PEO-based polymer electrolyte by incorporating barium titanate nanoparticles coated with 3-(triethoxysilyl) propionitrile (BTO@TESPN) as solid fillers. With 10 wt% of BTO@TESPN, ionic conductivity and critical current density at 60 C is improved to 5.67  10-4 S cm-2 and 1.6 mA cm-2, respectively, compared to 2.69  10-4 S cm-2 and 1.0 mA cm-2 without the filler. Furthermore, the symmetric cell with Li utilizing this electrolyte demonstrates stable cycling at a rate of 0.1 mA cm-2 for a minimum duration of 1000 h. Additionally, the lithium iron phosphate (LiFePO4)-Li battery exhibits excellent stability up to 700 cycles at 60 C at a current rate of 0.5 C while maintaining a capacity retention of up to 93.0%. This research presents an innovative approach towards enhancing PEO-based solid polymer electrolytes, by regulating the interface between the filler and the polymer matrix.

Rights:

• In Copyright
  

Keyword: Solid polymer electrolyte, poly(ethylene oxide), barium titanate, surface coating, lithium-metal battery

Date published: 2025-03-04

Publisher: Royal Society of Chemistry (RSC)

Journal:

• JOURNAL OF MATERIALS CHEMISTRY A (ISSN: 20507488) vol. 13 p. 9453-9461

Funding:

• National Institute for Materials Science

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.5388

First published URL: https://doi.org/10.1039/d5ta00072f

Related item:

Other identifier(s):

Contact agent:

Updated at: 2026-03-05 08:30:04 +0900

Published on MDR: 2026-03-04 18:12:08 +0900