Journal
SUSTAINABLE ENERGY & FUELS
Volume 4, Issue 5, Pages 2229-2235Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0se00013b
Keywords
-
Funding
- Davidson School of Chemical Engineering at Purdue University
Ask authors/readers for more resources
Enhancing the ionic conductivity and the thermal stability of solid electrolytes is crucial for the development of all-solid-state batteries. Here, we report polytetrafluoroethylene (PTFE) as an additive to improve the ionic conductivity and thermal stability of polyethylene oxide (PEO) based electrolytes. Electrochemical Impedance Spectroscopy (EIS) measurements for composite electrolytes with varying ratios of PEO and PTFE confirm the enhancement in the ionic conductivity at both room temperature and 60 degrees C. From the EIS measurements of electrolytes at room temperature, PEO100 showed the lowest ion conductivity (2.25 x 10(-8) S cm(-1)), while electrolytes with added PTFE showed a higher ion conductivity (6.62 x 10(-8) S cm(-1)). The charge-discharge measurement confirms that adding PTFE improved the capacity from 139 mA h g(-1) to 163 mA h g(-1) with cycling stability. Furthermore, the thermal stability of PTFE blended PEO composite electrolyte is enhanced, resulting in lower heat liberation by a factor of two compared with PEO electrolyte. Our results show that PTFE-PEO composite has the potential to be used as a solid electrolyte in lithium metal batteries.
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