Sorry, you need to enable JavaScript to visit this website.

Thermally cured semi-interpenetrating electrolyte networks (s-IPN) for safe and aging-resistant secondary lithium polymer batteries

TitleThermally cured semi-interpenetrating electrolyte networks (s-IPN) for safe and aging-resistant secondary lithium polymer batteries
Publication TypeArticolo su Rivista peer-reviewed
Year of Publication2016
AuthorsNair, J.R., Destro M., Bella F., Appetecchi Giovanni Battista, and Gerbaldi C.
JournalJournal of Power Sources
Volume306
Pagination258-267
ISSN03787753
KeywordsAging resistance, Cathode active material, Crosslinking, Electric batteries, Electrolytes, Free radicals, Interpenetrating polymer networks, Lithium, Lithium batteries, Lithium-ion batteries, Mechanical deformation, Metal testing, Moderately high temperature, Polyelectrolytes, Polymer electrolyte, Semi-interpenetrating polymer networks, Solid electrolytes, Solid polymer electrolyte membranes, Thermal polymerizations
Abstract

Truly solid polymer electrolyte membranes are designed by thermally induced free radical polymerisation. The overall membrane architecture is built on a semi-interpenetrating polymer network (s-IPN) structure, where a di-methacrylate oligomer is cross-linked (in situ) in the presence of a long thermoplastic linear PEO chain and a supporting lithium salt to obtain a freestanding, flexible and non-tacky film. In the envisaged systems, the di-methacrylate functions as a soft cross-linker, thus avoiding physico-mechanical deformation of the s-IPNs at elevated temperature, without hampering the ionic conductivity. s-IPNs exhibit remarkable stability towards lithium metal and no traces of impurity are detected while testing their oxidation stability (4.7 V vs. Li/Li+) towards anodic potential. The newly elaborated system is also successfully tested at moderately high temperature in Li metal cells in which LiFePO4/C is used as the cathode active material, showing excellent indications of safe and highly durable electrolyte separator (i.e.; 2000 cycles at reasonably high 1C rate). © 2015 Elsevier B.V.

Notes

cited By 10

URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-84950269425&doi=10.1016%2fj.jpowsour.2015.12.001&partnerID=40&md5=5e82077880dbd51ebe9b11d6bc9c526a
DOI10.1016/j.jpowsour.2015.12.001
Citation KeyNair2016258