Jump to main content
Jump to site search

Issue 41, 2018
Previous Article Next Article

Factors affecting cyclic durability of all-solid-state lithium batteries using poly(ethylene oxide)-based polymer electrolytes and recommendations to achieve improved performance

Author affiliations

Abstract

A detailed experimental analysis of the factors affecting cyclic durability of all-solid-state lithium batteries using poly(ethylene oxide)-based polymer electrolytes was published in EES by Nakayama et al. We use quantum mechanics to interpret these results, identifying processes involved in the degradation of rechargeable lithium batteries based on polyethylene oxide (PEO) polymer electrolyte with LiTFSI. We consider that ionization of the electrolyte near the cathode at the end of the recharge step is probably responsible for this degradation. We find that an electron is likely removed from PEO next to a TFSI anion, triggering a sequence of steps leading to neutralization of a TFSI anion and anchoring of another TFSI to the PEO. This decreases the polymer conductivity near the cathode, making it easier to ionize additional PEO and leading to complete degradation of the battery. We refer to this as the Cathode Overpotential Driven Ionization of the Solvent (CODIS) model. We suggest possible ways to confirm experimentally our interpretation and propose modifications to suppress or reduce electrolyte degradation.

Graphical abstract: Factors affecting cyclic durability of all-solid-state lithium batteries using poly(ethylene oxide)-based polymer electrolytes and recommendations to achieve improved performance

Back to tab navigation

Supplementary files

Publication details

The article was received on 27 Aug 2018, accepted on 26 Sep 2018 and first published on 26 Sep 2018


Article type: Paper
DOI: 10.1039/C8CP05440A
Author version
available:

Download author version (PDF)
Phys. Chem. Chem. Phys., 2018,20, 26098-26104

  •   Request permissions

    Factors affecting cyclic durability of all-solid-state lithium batteries using poly(ethylene oxide)-based polymer electrolytes and recommendations to achieve improved performance

    F. Faglioni, B. V. Merinov, W. A. Goddard and B. Kozinsky, Phys. Chem. Chem. Phys., 2018, 20, 26098
    DOI: 10.1039/C8CP05440A

Search articles by author

Spotlight

Advertisements