A stable thin-film lithium electrolyte: Lithium phosphorus oxynitride

Journal Article · Sat Feb 01 04:00:00 EST 1997 · Journal of the Electrochemical Society

DOI:https://doi.org/10.1149/1.1837443· OSTI ID:465098

Yu, X; Bates, J B; Jellison, Jr, G E ^[1]; Hart, F X ^[2]

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1. Oak Ridge National Lab., TN (United States). Solid State Div.
2. Univ. of the South, Sewanee, TN (United States). Dept. of Physics

The electrochemical and optical properties of lithium phosphorus oxynitride (Lipon) thin films have been studied with an emphasis on the stability window vs. lithium metal and the behavior of the Li/Lipon interface. Impedance measurements made between {minus}26 and 140 C show that Lipon exhibits a single, Li{sup +}-ion conducting phase with an average conductivity of 2.3 ({+-}0.7) {times} 10{sup {minus}6} S/cm at 25 C and an average activation energy of E{sub a} = 0.55 {+-} 0.02 eV. No detectable reaction or degradation was evident at the Li/Lipon interface, and linear sweep voltammetry measurements on three-electrode cells indicated that Lipon is stable from 0 to about 5.5 V with respect to a Li{sup +}/Li reference. The complex refractive index of Lipon was measured by spectroscopic ellipsometry. Optical bandgaps of 3.45 and 3.75 eV were obtained from the ellipsometry data and from optical absorption measurements, respectively.

• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC05-96OR22464
• OSTI ID: 465098
• Journal Information: Journal of the Electrochemical Society, Journal Name: Journal of the Electrochemical Society Journal Issue: 2 Vol. 144; ISSN 0013-4651; ISSN JESOAN
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
36 MATERIALS SCIENCE
ELECTRICAL PROPERTIES
IONIC CONDUCTIVITY
LITHIUM NITRIDES
METAL-NONMETAL BATTERIES
OPTICAL PROPERTIES
PHOSPHORUS NITRIDES
REFRACTIVE INDEX
SOLID ELECTROLYTES