Study of the poly[oxymethylene oligo-(oxyethylene)]/lithium metal interface: Comparison of linear, cross-linked, and alkylated electrolyte films

Journal Article · Mon Apr 01 04:00:00 EST 1996 · Journal of the Electrochemical Society

DOI:https://doi.org/10.1149/1.1836632· OSTI ID:251060

Sloop, S E; Lerner, M M ^[1]

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1. Oregon State Univ., Corvallis, OR (United States)

The formation and stabilities of interfaces between poly[oxymethylene oligo-(oxyethylene)] (PEM)-salt polymer electrolytes and lithium metal or LiC{sub x} are investigated. The Li/PEM{sub 25}LiClO{sub 4} interface (where x in PEM{sub x}LiAn indicates the mole ratio of O/Li in the electrolyte) demonstrates behavior consistent with the formation of a solid electrolyte interface, with a stable interfacial resistance of 900 {Omega} cm{sup 2} at 50 C. UV-cross-linked films do not form a stable interface, R{sub int} rapidly increases to greater than 10{sup 5} {Omega} cm{sup 2}. When cross-linked samples are treated with methyl iodide, hexamethyldisilazane/trimethylchlorosilane or upon addition of the plasticizer polyethylene glycol dimethyl ether, R{sub int} at 50 C stabilizes at approximately 2,000 {Omega} cm{sup 2}. The polymer electrolytes require a plasticizer to form a low impedance interface with LiC{sub x}.

• Sponsoring Organization: USDOE
• OSTI ID: 251060
• Journal Information: Journal of the Electrochemical Society, Journal Name: Journal of the Electrochemical Society Journal Issue: 4 Vol. 143; ISSN 0013-4651; ISSN JESOAN
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
CROSS-LINKING
ELECTRIC BATTERIES
ELECTRIC CONDUCTIVITY
INTERFACES
LITHIUM
LITHIUM CARBIDES
ORGANIC POLYMERS
SOLID ELECTROLYTES
ULTRAVIOLET RADIATION